Feeling sick (nausea) is common and usually goes away on its own. There are some things you can try that might help.
If you're also being sick (vomiting), you could become dehydrated. See what to do if you're vomiting.
Your GP can look for the cause and suggest treatments.
They may prescribe anti-sickness medicine if needed.
Call 111 for advice if you can't see a GP.
This could be a heart attack.
Lots of things can make you feel sick.
Any other symptoms you have may give you an idea of the cause. But don't self-diagnose – see a GP if you're worried.
Other reasons for feeling sick include:
Don't worry if you're not sure what the cause is. Try the things that may stop you feeling sick and see a GP if you don't feel better in a few days.