Food poisoning

Food poisoning is caused by eating food contaminated with germs such as bacteria or viruses. Symptoms can start within hours or days of eating the food. It is common and usually gets better on its own within a week.

Last updated Nov 9, 2026

What it is

The most important thing is to drink plenty of fluids to avoid dehydration. Oral rehydration solutions can help.

Good hygiene, cooking food thoroughly and storing it properly help prevent it.

Common signs

  • Feeling sick and vomiting
  • Diarrhoea
  • Stomach cramps
  • High temperature
  • Feeling generally unwell

How it is usually diagnosed

  • Usually based on symptoms
  • A stool sample, if symptoms are severe or last a long time

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Stool test results
  • Notes on what was eaten and when
  • Discharge letters, if admitted

Questions to ask your doctor

  • Do I need a stool test?
  • When can I go back to work or school?
  • Should I avoid any foods while I recover?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Bloody diarrhoea, signs of severe dehydration, or being unable to keep fluids down: get urgent medical help

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources