Is stomach flu dangerous?

Gastroenteritis affects the stomach and intestines. Fluid and salt losses can build quickly when a person cannot drink enough, especially in babies, older adults, pregnant people, and anyone with a long-term illness. Nausea, abdominal pain, fever, loose stools and loss of appetite may occur. A high fever, worsening pain, or blood suggests that the illness may need a closer look rather than simple home care.

Take small, regular sips of water or an oral rehydration drink. If vomiting settles, try bland foods in small portions and avoid alcohol. Wash hands with soap and water, clean contaminated surfaces, and stay away from food preparation for other people while unwell. Do not give children or adults medicines for diarrhoea without checking that they are suitable for the person and the suspected cause.

Seek urgent medical care for fainting, confusion, extreme weakness, little or no urine, inability to keep fluids down, blood in vomit or stool, severe or localised abdominal pain, or a stiff neck with fever. Get prompt advice when a child, older adult, pregnant person, or medically vulnerable person is deteriorating.

Tell the clinician when symptoms began, how often you are vomiting or passing stool, what you have managed to drink, and whether urine is reduced. Ask whether testing, prescription treatment, or assessment for dehydration is needed.