What is Fever?
Fever is a temporary increase in body temperature, usually in response to an infection or illness. Normal body temperature is around 37°C (98.6°F). A fever is generally considered when the temperature is 38°C (100.4°F) or higher.
Fever itself is not a disease — it is a sign that your body is fighting an infection. Most fevers are caused by viral infections and resolve on their own within a few days.
Temperature Guide
| Temperature | Classification | Action |
|---|---|---|
| 36.1 - 37.2°C | Normal | No action needed |
| 37.3 - 38.0°C | Low-grade fever | Monitor, rest, hydrate |
| 38.1 - 39.0°C | Moderate fever | Paracetamol, rest, fluids |
| 39.1 - 40.0°C | High fever | Medical advice recommended |
| Above 40°C | Very high fever | Seek medical attention immediately |
Common Causes of Fever
Infections
- Viral infections (cold, flu, dengue)
- Bacterial infections (UTI, pneumonia)
- Respiratory tract infections
- Leptospirosis
- Typhoid fever
Other Causes
- Heat exhaustion
- Certain medications
- Inflammatory conditions
- Post-vaccination reaction
- Autoimmune diseases
How to Manage Fever at Home
Home Care Tips
- Rest: Your body needs energy to fight the infection. Stay in bed and avoid heavy work.
- Stay hydrated: Drink plenty of water, king coconut water, soups, and oral rehydration solutions (Jeevani). Avoid tea and coffee.
- Paracetamol: Take 500mg-1000mg every 6 hours as needed. Do not exceed 4000mg in 24 hours. Avoid aspirin and ibuprofen if dengue is suspected.
- Tepid sponging: Use lukewarm (not cold) water to sponge the forehead, armpits, and groin to bring down temperature.
- Wear light clothing: Avoid heavy blankets. Use a light sheet.
- Monitor temperature: Check temperature every 4-6 hours and keep a record.
- Eat light meals: Rice porridge (kola kanda), soups, and easily digestible food.
Important: Fever in Sri Lanka
In Sri Lanka, fever lasting more than 2-3 days should be investigated. Common serious causes include:
- Dengue fever — especially during rainy seasons. A full blood count (FBC) is essential.
- Leptospirosis — if exposed to flood water, paddy fields, or rat-contaminated areas.
- Typhoid — from contaminated food or water.
When to See a Doctor
Seek medical attention if:
- Fever above 39°C (102°F) that doesn't respond to Paracetamol
- Fever lasting more than 3 days
- Severe headache, body pain, or joint pain
- Skin rash or red spots on the skin
- Vomiting or inability to keep fluids down
- Abdominal pain
- Bleeding from gums, nose, or blood in stools
- Reduced urine output or dark-colored urine
- Confusion, drowsiness, or difficulty waking up
- Fever in patients with diabetes, kidney disease, or on immunosuppressants
Important: This information is for educational purposes only. If you are unsure about your symptoms or they are severe, please consult a doctor. Our doctors are available for home visits and telemedicine consultations.