Symptoms of Flu
The symptoms of flu often develop suddenly and are more intense than those of a common cold. Flu typically begins with a high fever and quickly progresses to include a range of respiratory and systemic symptoms. While many people recover within a few days to two weeks, others may develop complications that require medical attention.
Common Symptoms
Fever or chills
Dry cough that may worsen over time
Sore throat and difficulty swallowing
Muscle aches and joint pain
Headache, often severe
Extreme tiredness or fatigue
Nasal congestion or runny nose
Loss of appetite
Some people also experience:
Sweating and clammy skin
Watery eyes
Nausea or vomiting (especially in children)
Not everyone with flu has a fever. Elderly individuals, in particular, may present without fever but still have other severe symptoms.
Differences Between Flu and Cold
While colds develop gradually, the flu tends to start abruptly. Fatigue, body aches, and high fever are much more common and severe with flu. Colds rarely cause the exhaustion and muscle pain that flu typically brings.
| Symptom | Cold | Flu |
| Onset | Gradual | Sudden |
| Fever | Rare | Common |
| Fatigue | Mild | Severe |
| Body aches | Uncommon | Common and intense |
| Cough | Mild or moderate | Persistent and dry |
Symptoms in Children
Children with flu may show:
Irritability or crying more than usual
Refusal to eat or drink
High fever, sometimes over 39°C
Seizures, in rare cases (febrile seizures)
Vomiting and diarrhoea are more common in children than in adults.
When to Seek Medical Help
Urgent care is needed if:
Breathing becomes difficult or rapid
Chest pain or pressure develops
Symptoms improve then suddenly worsen
Severe dehydration occurs
Confusion or dizziness is present
Symptoms of Flu
Recognising the symptoms of flu allows for early treatment, especially in high-risk individuals. Antiviral medications are most effective when started within the first 48 hours of symptoms.
