Colds tend to come on gradually, with a blocked or runny nose, sneezing and a mild sore throat, and usually clear up within a week or so. Flu tends to hit suddenly and harder, with a high fever, aching body, extreme tiredness and a headache, and can knock you out for a week or more.
Both are usually best treated at home with rest, fluids, and over-the-counter remedies for symptom relief — antibiotics don't work on colds or flu, as both are caused by viruses. Older people, young children, pregnant women and those with existing health conditions are more at risk of complications from flu, and are usually eligible for an annual flu vaccine. See your GP or call NHS 111 if symptoms are severe, don't improve, or you're in one of these higher-risk groups.
Common questions
How can I tell a cold from flu?
Colds come on gradually with a blocked or runny nose and a mild sore throat. Flu tends to hit suddenly and harder, with a high fever, aching body and extreme tiredness.
Do antibiotics help with colds or flu?
No, both are caused by viruses, so antibiotics do not work on them.