What should you know about food poisoning from watermelon?

A whole melon can carry germs on its rind. When it is cut, a knife can move contamination from the outside to the moist flesh. Sliced fruit can also become contaminated through hands, cutting boards, shared utensils, warm storage, or prolonged display. Symptoms may include nausea, vomiting, diarrhoea, abdominal pain, and fever. These symptoms can have other causes, so the timing of the meal and whether others who ate the same fruit became ill are useful details, not proof of the source.

Stop eating the suspected melon and keep the packaging or purchase details if available. Sip water or oral rehydration solution often; taking a little at a time can be easier if nausea is present. Rest and eat small portions once you feel able. Wash hands and clean surfaces that touched the cut fruit. Do not share food while you have diarrhoea or vomiting, and do not use leftover melon to test whether it was responsible. A clinician can advise about medicines based on your symptoms and health.

Get urgent help for fainting, confusion, marked weakness, very little urine, inability to keep fluids down, blood in stool or vomit, severe abdominal pain, or breathing problems. Fever with a deteriorating general condition also warrants prompt assessment. Seek advice sooner for a young child, older adult, pregnancy, or a condition that increases dehydration risk. If symptoms are not easing or you cannot drink enough, arrange medical review rather than waiting for appetite to return.

Tell the clinician when the watermelon was eaten, whether it was whole or pre-cut, how it was stored, and when symptoms started. Ask whether you need an examination or tests, how much fluid is appropriate, and which warning signs should trigger a return visit. Mention fever, pain, vomiting, stool changes, pregnancy, and regular medicines.