NHS Fife is warning that there is a rise in cases of the winter vomiting bug.
The norovirus is said to be one of the most common stomach bugs in the UK.
It can affect any age group and spreads rapidly, with symptoms caused by the gastroenteritis virus including diarrhoea, stomach pain and vomiting.
The virus usually clears up by itself in a few days and without the need for medication.
There is a range of advice from NHS Fife including to wash hands regularly with soap and water, particularly after using the toilet and before preparing or handling food.
If symptoms are developed, other people must not be visited and care homes, GP surgeries and hospitals must be avoided.
Anyone with the bug has to stay off work or school until at least 48 hours after the symptoms have cleared, with other tips issued by the health board.
Dr Joy Tomlinson, NHS Fife's Director of Public Health, has issued a range of advice in a video above.
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