Mumps infections have been confirmed in South London boroughs according to Public Health England.
The ‘hamster face’ disease, as described by the NHS, isn’t usually serious but the swellings in the face are painful.
It can also cause headaches, joint pain and a high temperature.
You should contact your doctor if you or your child have symptoms, as it could be a more serious condition like glandular fever or tonsillitis.
Two infections have been reported in Wandsworth.
Public Health England said that last week (ending March 4) there were mumps cases in the following boroughs:
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