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Altitude Sickness

Altitude Sickness

Altitude Sickness Overview

Altitude Sickness, Health Conditions /

Altitude Sickness Overview Altitude sickness, also known as acute mountain sickness (AMS), is a condition that occurs when someone ascends to high altitudes too quickly, without giving the body enough time to adjust to the reduced oxygen levels. It commonly affects travellers, hikers, and climbers at elevations above 2,500 metres (8,200 feet), though some people may experience symptoms even lower. The air becomes thinner the higher you go, meaning less oxygen is available with each breath. If the body doesn’t adapt gradually, symptoms like headaches, nausea, fatigue, and dizziness can develop. These symptoms range from mild and uncomfortable to severe and life-threatening. There are three main types of altitude sickness: In South Africa, this is rarely encountered at local elevations, but it becomes a real risk when travelling to mountainous regions such as Kilimanjaro, the Drakensberg, the Himalayas, or the Andes. Even healthy and fit individuals can develop symptoms if they ascend too quickly. While mild altitude sickness usually resolves with rest or descent, severe forms require urgent medical attention. Preventing this sickness is often as simple as ascending slowly, staying hydrated, and allowing time for acclimatisation. In the next section, we’ll explore what causes this sickness and why some people are more susceptible than others. 👉 [Next: Causes of Altitude Sickness] Symptoms of Chronic Pancreatitis Complications of Altitude Sickness Treatment for Altitude Sickness Diagnosis of Altitude Sickness

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Causes of Altitude Sickness

Causes of Altitude Sickness

Altitude Sickness, Health Conditions /

Causes of Altitude Sickness Early causes of altitude sickness occur from rapid exposure to low oxygen levels at higher elevations. As altitude increases, air pressure drops, reducing the amount of oxygen available for the body to use. This drop in oxygen is called hypoxia, and it affects how the brain, lungs, and muscles function. The Role of Acclimatisation Your body can adapt to high altitudes — a process known as acclimatisation. This involves: However, these adaptations take several days. When you ascend too fast, your body doesn’t have time to respond, resulting in altitude sickness. Common Triggers Risk Factors Interestingly, the speed of ascent is often more important than the absolute altitude. Someone hiking slowly up a mountain may stay healthy, while another who drives or flies to the same height in hours could become seriously ill. Understanding what causes altitude sickness can help prevent it. Let’s now look at how to identify the symptoms early. 👉 [Next: Diagnosis of Altitude Sickness] Treatment of Carbon Monoxide Poisoning Treatment for Altitude Sickness Altitude Sickness Overview

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Diagnosis of Altitude Sickness

Diagnosis of Altitude Sickness

Altitude Sickness, Health Conditions /

Diagnosis of Altitude Sickness Primarily, the diagnosis of altitude sickness is based on symptoms and recent travel history. There are no blood tests or scans required in most cases — the diagnosis is clinical, based on what the patient feels and how recently they ascended to a higher altitude. Key Symptoms of Acute Mountain Sickness (AMS): These usually begin 6 to 24 hours after arriving at altitude and may worsen overnight. Red Flags for Severe Forms: These are life-threatening emergencies that require immediate descent and medical care. Diagnostic Tools in the Field In high-altitude settings, healthcare providers or guides may use: No imaging or lab work is needed unless complications arise. If you’re planning a trip to a high-altitude location — like Mount Kilimanjaro or the Andes — being aware of these symptoms could help you or your group identify the condition early and take action before it escalates. 👉 [Next: Treatment for Altitude Sickness] Symptoms of Concussion Complications of Altitude Sickness Causes of Altitude Sickness Altitude Sickness Overview

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Treatment for Altitude Sickness

Treatment for Altitude Sickness

Altitude Sickness, Health Conditions /

Treatment for Altitude Sickness Treatment for altitude sickness depends on the severity of symptoms. Mild cases can often be managed with rest and hydration, while severe cases may require emergency descent and oxygen therapy. Mild to Moderate AMS The first step is to: If symptoms improve after 24–48 hours, you may be able to continue ascending — but only slowly and cautiously. Medications may help: Severe AMS, HACE, or HAPE For life-threatening forms of altitude sickness: Additional medications include: People should use these only under medical supervision or with trained guides in remote settings. In South Africa, altitude sickness may not be common locally, but South African travellers frequently experience it abroad. Pre-travel consultations with travel clinics can help with prevention planning and medication. 👉 [Next: Complications of Altitude Sickness] Treatment of Concussion Causes of Altitude Sickness Diagnosis of Altitude Sickness Altitude Sickness Overview

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Complications of Altitude Sickness

Complications of Altitude Sickness

Altitude Sickness, Health Conditions /

Complications of Altitude Sickness While mild altitude sickness is temporary, Complications of Altitude Sickness can become life-threatening without prompt treatment. Complications affect the brain, lungs, and overall function, especially at altitudes over 3,500 metres. 1. High-Altitude Cerebral Oedema (HACE) This is swelling of the brain due to fluid leakage from blood vessels. If untreated, it can lead to: It is often preceded by AMS symptoms that worsen, such as severe headache and confusion. 2. High-Altitude Pulmonary Oedema (HAPE) This occurs when fluid builds up in the lungs, severely impairing oxygen exchange. It can develop quickly and may be fatal. Signs include: Even physically fit individuals are at risk. Immediate descent is crucial. 3. Long-Term Effects Though rare, recurring exposure to high altitudes without proper acclimatisation may lead to: 4. Accidents and Injury Confusion, dizziness, and poor decision-making at altitude can lead to falls, accidents, or getting lost — especially in remote hiking environments. Prevention Is Key Most complications are entirely preventable. Ascending slowly, recognising early symptoms, and knowing when to descend are the most effective strategies. South African and international trekking groups often include trained guides to help monitor climbers and manage risk. Education, preparation, and awareness make all the difference. 👉 End of Series | Back to Overview Acute Respiratory Distress Syndrome Causes of Altitude Sickness Treatment for Altitude Sickness Diagnosis of Altitude Sickness Altitude Sickness Overview

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