Does gastroenteritis cause loss of appetite?

When the stomach and intestines are irritated, nausea, bloating, cramps and altered bowel movements can make food seem unappealing. A short spell of poor appetite can occur while these symptoms are active. Loss of appetite also occurs with many other illnesses and stresses, so it does not by itself establish the cause.

Not eating much for a short time is often less important than failing to drink. Vomiting and diarrhoea can reduce fluid and salt levels even when you have no desire for food.

Start with frequent small sips of water, clear fluids or an oral rehydration drink. Once nausea eases, try small portions of plain foods that you tolerate, without forcing a full meal.

Keep track of what you can drink and whether you are urinating normally. Rest may help while your stomach settles. Avoid alcohol, and seek pharmacist advice before using medicines if you are pregnant, have a long-term condition or take regular prescriptions.

Seek urgent help if you cannot keep fluids down, feel faint, become confused, have severe abdominal pain, or notice blood in vomit or stool. Arrange medical advice if poor intake continues, you are losing strength, urine is very dark or infrequent, or symptoms are worsening rather than easing.

A clinician can advise how to protect hydration, what foods to reintroduce, and whether your medicines or medical history change the plan.