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Find information on various health conditions affecting people of all ages. This category covers causes, symptoms, diagnosis, and management options for physical illnesses and chronic diseases. Get insights to help you understand different health challenges and make informed decisions about your wellbeing.

Man sleeping with smartwatch tracking sleep and heart rate

Diagnosis of Excessive Daytime Sleepiness

Excessive Daytime Sleepiness, Health Conditions /

Diagnosis of Excessive Daytime Sleepiness The diagnosis of excessive daytime sleepiness requires a detailed clinical evaluation to uncover the cause of the drowsiness. Since excessive daytime sleepiness can result from sleep disorders, medical conditions, or lifestyle factors, doctors use a combination of history-taking, physical exams, and specialised tests. Medical History and Sleep Diary Doctors begin by asking: How many hours of sleep you get each night Whether you wake up feeling refreshed If you experience snoring, gasping, or leg movements during sleep When and where you feel sleepy during the day Any recent changes in weight, mood, or medication A sleep diary, kept for one to two weeks, can help track sleep duration, quality, and daytime symptoms. It may reveal patterns such as inconsistent bedtimes, frequent awakenings, or signs of sleep deprivation. Physical Examination The exam may check for: Obesity or large neck circumference (linked to sleep apnoea) Thyroid enlargement, which may suggest hypothyroidism Pale skin, indicating anaemia Signs of nasal obstruction, like enlarged tonsils or a deviated septum If sleep apnoea or other disorders are suspected, further testing is required. Screening Tools Doctors may use standard questionnaires like: Epworth Sleepiness Scale (ESS) – Rates how likely you are to fall asleep in various situations STOP-BANG questionnaire – Screens for risk of sleep apnoea High scores on these tools suggest the need for referral to a sleep specialist or for a sleep study. Sleep Studies (Polysomnography) The most definitive diagnostic test is a sleep study, which records: Brain activity Breathing rate and airflow Oxygen levels Heart rate Muscle and eye movements Sleep studies help diagnose: Obstructive sleep apnoea Narcolepsy Periodic limb movement disorder REM behaviour disorder For suspected narcolepsy, a multiple sleep latency test (MSLT) may also be done the next day to measure how quickly and often a person falls asleep during short naps. Blood Tests Doctors may also order: Full blood count (FBC) – To detect anaemia Thyroid function tests – To rule out hypothyroidism Blood glucose tests – To check for diabetes Vitamin B12 and iron levels – Deficiencies may cause fatigue Diagnosis of Excessive Daytime Sleepiness In South Africa In South Africa, sleep studies are mostly available in private centres, limiting access for many patients. As a result, many diagnoses are based on symptoms and physical findings alone. Increasing public and professional awareness can lead to earlier recognition and intervention. The diagnosis of excessive daytime sleepiness requires a holistic approach. With proper evaluation, the root cause can be identified and treated effectively. [Next: Treatment of Excessive Daytime Sleepiness →]

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Female nurse sleeping on a couch during a break

Treatment of Excessive Daytime Sleepiness

Excessive Daytime Sleepiness, Health Conditions /

Treatment of Excessive Daytime Sleepiness The treatment of excessive daytime sleepiness focuses on correcting the root cause and improving sleep quality. Excessive daytime sleepiness may respond to lifestyle changes, medical therapies, or specific treatments for sleep disorders. Early intervention can restore energy levels and prevent accidents. Lifestyle Changes For many people, better sleep habits make a significant difference: Get 7–9 hours of sleep nightly, aiming for a consistent bedtime and wake time Avoid caffeine and alcohol several hours before bed Create a quiet, dark, and cool sleeping environment Avoid screens at least 1 hour before bedtime Exercise regularly, but not right before bed Improving sleep hygiene may reduce or eliminate mild daytime sleepiness. Medical Treatments Treatment depends on the underlying condition: 1. Obstructive Sleep Apnoea (OSA) CPAP (Continuous Positive Airway Pressure) is the first-line treatment. It keeps the airway open during sleep, improving oxygen levels and restoring restful sleep. Weight loss and positional therapy may also help. 2. Narcolepsy Stimulants such as modafinil or methylphenidate may be prescribed to keep patients awake during the day Sodium oxybate, in some cases, improves nighttime sleep and reduces daytime sleepiness 3. Restless Legs Syndrome (RLS) Treated with dopaminergic agents, iron supplements, or lifestyle adjustments 4. Depression or Anxiety Managed with antidepressants, cognitive behavioural therapy (CBT), and stress reduction strategies 5. Hypothyroidism or Anaemia Treated with thyroxine or iron and vitamin B12 supplements, respectively Behavioural Therapies Cognitive behavioural therapy for insomnia (CBT-I) can improve sleep patterns and reduce daytime fatigue Sleep restriction therapy helps reset the body’s internal clock in cases of delayed sleep phase disorder Driving and Safety Patients should be advised not to drive or operate heavy machinery if their sleepiness is severe or untreated. Regular follow-ups are essential for people using sedating medications or those with a history of accidents. Treatment of Excessive Daytime Sleepiness In South Africa In South Africa, access to CPAP machines and sleep medications may be limited in public healthcare. However, lifestyle changes and basic treatments like iron or thyroid supplements are widely available and effective. Better training of primary care providers in sleep medicine could improve outcomes. The treatment of excessive daytime sleepiness restores productivity, improves mood, and reduces health risks. Most people improve significantly once the cause is found and addressed. [Next: Complications of Excessive Daytime Sleepiness →]

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Tired doctor resting at desk with alarm clock and stethoscope

Complications of Excessive Daytime Sleepiness

Excessive Daytime Sleepiness, Health Conditions /

Complications of Excessive Daytime Sleepiness The complications of excessive daytime sleepiness affect nearly every area of life, from safety and performance to emotional wellbeing. When excessive daytime sleepiness is untreated, it can increase the risk of serious accidents, health problems, and long-term cognitive decline. Road and Work Accidents Drowsiness slows reaction time and impairs judgement. It can lead to: Car accidents, especially during long drives or in early morning traffic Workplace injuries, particularly in jobs requiring focus, such as construction or machine operation Poor academic or job performance, due to lapses in attention and reduced memory Microsleeps while driving are particularly dangerous and often go unnoticed until it’s too late. Mental and Emotional Health Persistent sleepiness contributes to: Irritability and mood swings Depression and anxiety, especially if quality of life is reduced Social withdrawal, due to embarrassment or exhaustion Poor motivation, making daily tasks harder to complete These emotional effects can strain relationships and reduce life satisfaction. Physical Health Risks If the root cause is untreated, serious health consequences may follow: Heart disease, especially in people with untreated sleep apnoea High blood pressure and stroke, due to oxygen deprivation during sleep Obesity and type 2 diabetes, due to hormonal disruptions and reduced activity Immune suppression, increasing the risk of infections Cognitive Decline Over time, inadequate sleep may affect: Memory consolidation Attention span Decision-making ability Learning and academic performance In older adults, long-standing sleep deprivation may even raise the risk of developing dementia. Social and Lifestyle Consequences People may experience: Embarrassment or shame, especially if they fall asleep in public or during conversations Misunderstandings, where others perceive them as lazy or disengaged Difficulty maintaining relationships, due to irritability or lack of energy Financial strain, from lost productivity or frequent sick leave Complications of Excessive Daytime Sleepiness In South Africa In South Africa, these complications are often overlooked. A lack of access to sleep studies and specialist care means many people suffer in silence or are misdiagnosed. Public campaigns promoting sleep health and workplace wellness initiatives could help change this. The complications of excessive daytime sleepiness are avoidable in most cases. Early recognition, proper treatment, and supportive care make a substantial difference in health, safety, and overall quality of life. [Next: Back to Overview →]

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Illustration showing symptoms of erythromelalgia in hands and feet

Erythromelalgia

Erythromelalgia, Health Conditions /

Erythromelalgia Doctors define erythromelalgia as a rare condition that causes episodes of burning pain, redness, and increased temperature in the hands, feet, or sometimes the face or ears. Erythromelalgia symptoms are typically triggered by heat, exercise, or stress, and they improve with cooling or rest. The name comes from Greek words meaning “red limb pain”. This condition can range from mildly irritating to severely disabling. Attacks can last from minutes to hours and may occur several times a day or only occasionally. For some people, the symptoms become chronic and interfere with sleep, mobility, or everyday activities. There are two main types: Primary erythromelalgia, which occurs without another underlying condition and may be inherited in some families Secondary erythromelalgia, which develops due to another health issue such as blood disorders, autoimmune diseases, or nerve damage Although rare, this condition can significantly impact quality of life if not managed properly. It is more common in women than men and often begins in middle age, though children and adolescents can also be affected. Erythromelalgia In South Africa, awareness of erythromelalgia is low, and many cases may go misdiagnosed. People living in hot climates or rural areas may struggle to manage symptoms without access to supportive treatments. Recognising erythromelalgia early helps patients take control of triggers, seek medical care, and avoid unnecessary suffering. Understanding the Impact of Erythromelalgia Erythromelalgia, while rare, is a condition that can greatly affect those who suffer from it. The intense burning pain, redness, and heat in the limbs can range from an occasional nuisance to a debilitating chronic issue. Because symptoms often mimic other disorders, erythromelalgia is frequently misdiagnosed or dismissed, especially in healthcare systems with limited resources or low awareness. Early recognition is key to improving patient outcomes and helping individuals regain control over their quality of life. Differentiating Between Primary and Secondary Forms Distinguishing between primary and secondary erythromelalgia is crucial for appropriate treatment. Primary cases may be genetic and require symptom-focused care, while secondary erythromelalgia needs investigation into underlying causes such as blood disorders or nerve damage. A proper diagnosis not only ensures that serious root conditions are not missed but also allows for a more tailored and effective management plan, especially when symptoms are severe or persistent. Raising Awareness and Improving Access to Care In South Africa and similar regions, increasing awareness of erythromelalgia among both healthcare providers and the public is essential. Hot climates and limited access to specialised care can make symptom management more difficult, particularly in rural communities. With improved recognition, education, and support, patients can learn to identify triggers, make lifestyle adjustments, and access the care they need to manage this challenging condition more effectively. [Next: Causes of Erythromelalgia →]

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Red, inflamed patch on a person’s leg indicating possible erythromelalgia

Causes of Erythromelalgia

Erythromelalgia, Health Conditions /

Causes of Erythromelalgia The causes of erythromelalgia can be primary (genetic or idiopathic) or secondary to other medical conditions. Erythromelalgia is not caused by infection or trauma but by abnormalities in how blood vessels and nerves respond to heat or exertion. Primary Erythromelalgia This form often begins in childhood or adolescence. It may be: Idiopathic – where no clear cause is found Inherited – linked to mutations in the SCN9A gene, which affects sodium channels in nerve cells. This leads to increased pain signalling and poor regulation of blood vessel dilation. Primary cases may worsen over time or remain stable, but there is no cure. Secondary Erythromelalgia This form develops in response to another condition. Common causes include: 1. Blood Disorders Polycythaemia vera Essential thrombocythaemia Myelofibrosis These disorders increase blood cell counts, making the blood thicker and causing abnormal blood flow in small vessels. 2. Autoimmune Diseases Systemic lupus erythematosus (SLE) Rheumatoid arthritis Sjögren’s syndrome These diseases cause inflammation and affect blood vessels and nerves. 3. Nerve Damage (Neuropathy) People with small fibre neuropathy may develop erythromelalgia-like symptoms due to abnormal nerve signalling. Diabetes and alcohol abuse are common causes. 4. Medications and Toxins Some drugs may trigger or worsen symptoms, such as: Calcium channel blockers Bromocriptine Certain antidepressants Causes of Erythromelalgia In South Africa In South Africa, erythromelalgia may go unrecognised in patients with underlying blood or autoimmune disorders. Limited access to specialist testing, such as genetic or nerve studies, means diagnosis may be delayed. Clinicians should consider erythromelalgia in patients with unexplained burning pain and redness in the extremities—especially if the symptoms are heat-sensitive or worsen after exertion. Understanding the causes of erythromelalgia helps guide treatment and determine whether further testing for associated conditions is necessary. [Next: Symptoms of Erythromelalgia →]

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Red patches and irritation on the upper back due to erythromelalgia symptoms

Symptoms of Erythromelalgia

Erythromelalgia, Health Conditions /

Symptoms of Erythromelalgia The symptoms of erythromelalgia are distinctive and often follow a specific pattern of burning pain, redness, and warmth. Erythromelalgia mainly affects the hands and feet, but other areas such as the face, ears, or even the knees can sometimes be involved. Key Symptoms Burning pain – Often described as stinging, tingling, or aching Redness (erythema) – Skin turns red or purplish, especially during an attack Increased warmth – The affected area feels hot to the touch Swelling – Mild to moderate swelling may occur during flares Flare-ups triggered by heat, exertion, or emotional stress The symptoms often occur in both hands or both feet and usually appear symmetrically. Flares may last minutes to several hours and typically resolve with cooling or elevation of the limbs. Triggers Common triggers include: Warm weather or hot baths Exercise or walking Tight footwear or socks Emotional stress or anxiety Alcohol or spicy food Patients often learn to avoid triggers, but this may lead to social withdrawal or avoidance of normal activities. Chronic vs Episodic Some individuals have only occasional episodes, while others experience daily or near-constant symptoms. In chronic cases, sleep disturbance, anxiety, and reduced quality of life are common. Severe forms may prevent walking or standing for long periods. Additional Sensory Issues In people with underlying nerve damage, symptoms may include: Pins and needles Numbness Extreme sensitivity to touch (allodynia) These signs suggest involvement of the small nerve fibres and may complicate treatment. Symptoms of Erythromelalgia In South Africa In warmer parts of South Africa, the hot climate may make erythromelalgia worse or more frequent. Lack of air conditioning and access to cooling strategies can make day-to-day life very uncomfortable for affected individuals. Doctors should consider erythromelalgia in patients who complain of burning pain that worsens with heat but improves when feet or hands are placed in cool water. However, repeated soaking in cold water can lead to skin damage or ulcers, so guidance on safe cooling methods is vital. Recognising the symptoms of erythromelalgia allows patients and doctors to work together on reducing flares, improving comfort, and screening for underlying disorders. [Next: Diagnosis of Erythromelalgia→]

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Medical professional examining red, inflamed foot consistent with erythromelalgia symptoms

Diagnosis of Erythromelalgia

Erythromelalgia, Health Conditions /

Diagnosis of Erythromelalgia The diagnosis of erythromelalgia is based largely on symptoms and patient history. Since there are no specific blood tests or scans to confirm erythromelalgia. The condition is considered a clinical diagnosis—meaning doctors identify it based on what the patient describes and what is observed during a flare. Patient History Doctors will ask about: The nature and location of pain Colour and temperature changes in the skin How symptoms start, how long they last, and what makes them better or worse Whether symptoms are triggered by heat or relieved by cooling Any underlying conditions like autoimmune disease, diabetes, or blood disorders A history of repeated, painful redness in the hands or feet that worsens with heat and improves with cooling is highly suggestive of erythromelalgia. Physical Examination During an active flare, doctors may observe: Redness or a purplish rash Increased warmth of the skin Swelling Visible blood vessel changes When symptoms are not active, the skin may appear normal, making diagnosis more difficult. If needed, doctors may ask patients to keep a symptom diary or bring photographs of flare-ups. Blood and Laboratory Tests While there is no definitive blood test for erythromelalgia, several tests can help rule out underlying causes: Full blood count (FBC) – To check for polycythaemia vera or other myeloproliferative disorders Erythropoietin levels – To assess for secondary erythrocytosis Autoimmune markers – Including ANA and rheumatoid factor Blood glucose – To assess for diabetes-related neuropathy Thyroid function tests – To exclude thyroid dysfunction Nerve and Skin Testing If nerve involvement is suspected: Skin biopsy – May show small fibre neuropathy in some patients Quantitative sensory testing – Measures nerve response to stimuli Electromyography (EMG) and nerve conduction studies – Typically normal but may help exclude other conditions Differential Diagnosis Doctors must distinguish erythromelalgia from similar conditions: Raynaud’s phenomenon (which is cold-induced, not heat-triggered) Cellulitis or skin infection Complex regional pain syndrome (CRPS) Vasculitis or other vascular disorders Chilblains or pernio (cold-related vascular condition) Diagnosis of Erythromelalgia In South Africa In South Africa, diagnosis may be delayed due to low awareness and limited access to neurologists or dermatologists. Many patients are misdiagnosed with infections or allergic reactions. Telemedicine, symptom tracking apps, and patient support groups could improve recognition. The diagnosis of erythromelalgia requires a combination of careful history-taking, exclusion of other causes, and a high level of clinical awareness. Early recognition leads to better symptom control and prevents unnecessary testing or treatment. [Next: Treatment of Erythromelalgia →]

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Person with visibly red, inflamed soles of feet raised for cooling, representing erythromelalgia treatment

Treatment of Erythromelalgia

Erythromelalgia, Health Conditions /

Treatment of Erythromelalgia The treatment of erythromelalgia focuses on relieving symptoms, avoiding triggers, and addressing any underlying conditions. Because erythromelalgia is a chronic and often unpredictable condition, treatment must be personalised. No single therapy works for everyone, and a trial-and-error approach is often necessary. General Strategies Avoid heat exposure – Stay in cool environments, avoid hot showers, and reduce time in the sun Use cooling methods safely – Fans, cold water foot soaks (short periods only), cool packs, or air conditioning Wear loose, breathable clothing and open footwear Rest during flare-ups – Elevating the limbs can help improve symptoms Topical Treatments Some patients benefit from: Lidocaine creams or patches – Numbs the skin and may reduce burning Capsaicin cream – May desensitise overactive nerves (use cautiously, as it can cause irritation) Cooling gels or menthol-based creams – Provide short-term relief Oral Medications Treatment may include: Aspirin – Especially if symptoms are linked to high platelet counts or polycythaemia vera Anticonvulsants, such as gabapentin or pregabalin – For nerve-related pain Tricyclic antidepressants, like amitriptyline – Used for chronic neuropathic pain Selective serotonin-norepinephrine reuptake inhibitors (SNRIs) – May help in some patients Beta-blockers or calcium channel blockers – Occasionally used to regulate blood vessel dilation Medications must be started at low doses and increased slowly to monitor for side effects. Treatment of Underlying Conditions In secondary erythromelalgia, the best outcomes come from treating the root cause: Polycythaemia vera – Managed with phlebotomy or hydroxyurea Autoimmune diseases – May require steroids or immunosuppressants Neuropathy – Needs glucose control or treatment of the nerve condition Advanced Therapies For severe, treatment-resistant cases: Intravenous lidocaine infusions – Offered at specialist pain clinics Spinal cord stimulators – Rarely used, but may help in extreme cases Nerve blocks – Occasionally provide temporary relief Treatment of Erythromelalgia In South Africa Many patients in South Africa struggle to access pain specialists, especially within the public healthcare system. Increased training for primary care providers and access to neurologists can improve outcomes. The treatment of erythromelalgia requires a multidisciplinary, patient-focused approach. With the right combination of medication, cooling, and support, most patients can achieve meaningful symptom relief. [Next: Complications of Erythromelalgia →]

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Lower leg with inflamed and broken skin showing complications of erythromelalgia

Complications of Erythromelalgia

Erythromelalgia, Health Conditions /

Complications of Erythromelalgia The complications of erythromelalgia arise mainly from prolonged symptoms, poor symptom control, or unsafe attempts at self-treatment. Though erythromelalgia is not fatal, it can be physically and emotionally disabling without proper care. Skin Damage and Ulceration The urge to cool the skin during flare-ups can lead to: Cold burns, from ice packs applied directly to the skin Maceration, due to prolonged soaking in water Skin infections, if the skin barrier is broken Ulcers, particularly on the feet, from repeated trauma or overexposure to cold Educating patients about safe cooling methods is essential to avoid these problems. Reduced Mobility Frequent pain and flare-ups can result in: Avoidance of walking or standing, leading to deconditioning Dependence on mobility aids, especially in severe cases Increased fall risk, due to muscle weakness or sensory loss This may lead to isolation, weight gain, and worsening health over time. Sleep and Emotional Disturbances Many patients with erythromelalgia experience: Sleep disruption, especially from night-time flare-ups Chronic fatigue, due to unrelenting pain and poor rest Depression or anxiety, from coping with a rare and misunderstood illness Social withdrawal, due to embarrassment or mobility limitations Support groups, psychological counselling, and peer education can be invaluable. Work and Lifestyle Impact Absenteeism, due to pain and flare frequency Avoidance of social activities Strained relationships, especially if the condition is not well understood by family or friends Financial strain, from medication, travel to appointments, or loss of income Complications of Erythromelalgia In South Africa In South Africa, these complications are magnified by limited awareness and lack of specialist pain clinics in public health. Patients may be labelled as drug-seeking or misdiagnosed with psychiatric conditions. Community-level education and digital support platforms can help improve care and reduce stigma. The complications of erythromelalgia can be prevented or minimised with a proactive management plan. With consistent care, many people can live full lives despite the challenges posed by this complex condition. [Next: Back to Overview →]

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Comparison diagram showing normal red blood cell count versus erythrocytosis

Erythrocytosis

Erythrocytosis, Health Conditions /

Erythrocytosis The condition, Erythrocytosis, is a condition in which the body produces too many red blood cells. Erythrocytosis causes the blood to become thicker than normal, which can increase the risk of blood clots, stroke, or heart attack. It is often discovered during routine blood tests showing elevated haemoglobin or haematocrit levels. Red blood cells are essential for carrying oxygen throughout the body. When there are too many of them, circulation may slow, and oxygen delivery can become less efficient. In some cases, erythrocytosis causes no symptoms and is picked up incidentally. In others, it may lead to headaches, dizziness, blurred vision, or high blood pressure. There are two main types: Primary erythrocytosis, often caused by bone marrow disorders like polycythaemia vera (a type of blood cancer) Secondary erythrocytosis, caused by external factors such as chronic lung disease, living at high altitude, or certain tumours Erythrocytosis In South Africa, erythrocytosis may be underdiagnosed due to limited routine screening in many rural areas. People living in mountainous regions or with undiagnosed respiratory illnesses may be at higher risk. Understanding erythrocytosis is essential for early intervention, especially in patients with cardiovascular risk factors or chronic health conditions. Recognising the Importance of Early Detection Erythrocytosis, though sometimes asymptomatic, can have serious consequences if left undetected or untreated. With increased blood viscosity comes a heightened risk of complications such as blood clots, strokes, and heart attacks. As such, recognising early warning signs and investigating elevated haemoglobin or haematocrit levels during routine medical checks can make a significant difference in outcomes. In regions like South Africa, where routine screenings may not be readily available in rural settings, awareness becomes an especially crucial tool in improving public health. Addressing Underlying Causes and Risk Factors Effective management of erythrocytosis hinges on correctly identifying whether it is primary or secondary in origin. While primary erythrocytosis often stems from bone marrow disorders like polycythaemia vera, secondary causes range from environmental factors such as high altitude to underlying diseases like chronic lung conditions. Understanding these distinctions allows for more tailored treatment strategies—whether that involves addressing a tumour, improving oxygenation, or managing chronic illnesses that contribute to the condition. Moving Forward with Awareness and Prevention Raising awareness of erythrocytosis and improving access to diagnostic resources are key steps toward reducing its impact. Especially in underserved communities. Healthcare providers should remain vigilant for signs of the condition, particularly in patients with risk factors such as smoking, cardiovascular issues, or high-altitude residence. With proactive monitoring and appropriate interventions. The complications associated with erythrocytosis can be mitigated, leading to better long-term health outcomes and enhanced quality of life for those affected. [Next: Causes of Erythrocytosis →]

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