Reviewed by medical experts • For informational purposes only
Influenza symptoms: sudden fever, cough and body ache, and emergency signs in adults and children.
Flu symptoms usually begin suddenly, about 1 to 4 days after exposure.
Common symptoms
Not everyone with flu has a fever.
How long
Fever usually settles in 3 to 5 days. Cough and fatigue can linger for 1 to 2 weeks or more.
Emergency signs in adults (call 112 or 102)
Emergency signs in children
See a doctor early if you are
Pregnant, over 65, under 5, or have a chronic illness or weak immunity, because early treatment matters.
Key point
Most people recover at home, but warning signs and high-risk groups need prompt medical care.
Before your appointment
Note when symptoms began, your highest temperature, and any cough, breathing trouble or vomiting. List your medicines, long-term conditions, pregnancy, allergies and recent vaccines, including this year's flu vaccine. Mention contact with anyone who is ill. Ask about testing, antivirals, when to return to work or school and the warning signs that mean you should call 112 or 102.
Written By
Dr. Daksh
BDS
Reviewed By
Dr. Varun Gupta
MD Pharmacology, MBBS
Last updated on
27 Sep 2022 • 06:23 PM (IST)
Read Our Editorial Policy
Want to know more?
Have issue with the content?
Report Problem
Explore more articles about this topic
Stages of influenza from incubation to peak illness and recovery, and when a complication needs care.
Influenza home care: rest, fluids, paracetamol and hygiene, plus what to avoid such as aspirin in children.
Influenza diet: plenty of fluids, light foods, what to limit and caution with supplements.
How influenza is treated: rest and fluids for most, antivirals for high-risk people, and when to get urgent care.
Influenza medicines: symptom relief, antivirals such as oseltamivir, why antibiotics do not help, and the flu vaccine.
Ayurvedic view of flu-like fever (jwara): supportive care only, with cautions. Not a substitute for vaccination.