Fever in adults: causes, home care & when to see a doctor
A fever is your body's natural response to an infection — a temperature above 38°C (100.4°F). Most fevers in adults are caused by common viral infections and settle on their own with rest and fluids. Knowing what is normal and what is a warning sign helps you decide when to see a doctor.
Common causes of fever
Most fevers are due to viral infections such as the common cold, flu or a stomach bug. Bacterial infections (throat, urinary, chest), heat exposure and some medicines can also cause fever. In India, seasonal fevers from dengue, malaria and typhoid are important to rule out if the fever is high or persistent.
Safe home care
Rest, drink plenty of fluids to stay hydrated, and dress lightly. Sponging with lukewarm (not cold) water can help you feel comfortable. Monitor your temperature and general well-being. Do not self-prescribe antibiotics — most fevers do not need them, and antibiotics do not work against viruses.
When to see a doctor
Consult a doctor if your fever is above 39.4°C (103°F), lasts more than 3 days, keeps returning, or comes with a rash, severe headache, breathlessness, chest pain, persistent vomiting, confusion or reduced urination. In dengue-prone seasons, seek care early for high fever with body ache and bleeding tendency.
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Frequently asked questions
How high is a dangerous fever in adults?
A temperature of 39.4°C (103°F) or higher, or any fever with breathing difficulty, confusion, a spreading rash or persistent vomiting, needs prompt medical attention.
Should I take antibiotics for a fever?
Not usually. Most fevers are viral and clear on their own. Antibiotics only help bacterial infections and should be taken only when prescribed by a doctor.
Can I book a doctor for fever online?
Yes. You can start with an online video consultation to assess your symptoms, and the doctor will advise if you need in-person tests or care.
This guide is general health information and not a substitute for professional medical advice, diagnosis or treatment. Always consult a qualified doctor for your specific situation. In an emergency, call your local emergency number or visit the nearest hospital.