What should you know about itchy skin, stomach pain and fatigue?

Stomach pain may come from the stomach, bowel, gallbladder or another nearby organ. Food poisoning and gastroenteritis can cause pain with nausea, diarrhoea, vomiting and tiredness. Gastritis and acid reflux may cause upper abdominal discomfort, burning or nausea. Gallstones can cause episodes of pain beneath the ribs, sometimes after meals. Coeliac disease and Crohn's disease can affect digestion and energy, especially when symptoms persist.

Itch may be separate, caused by dry skin, allergy or a medicine, but itch together with yellow eyes or skin, dark urine or pale stools needs prompt medical review. Diverticular disease usually relates to lower abdominal symptoms and bowel changes rather than itch.

Write down where the pain is, when it starts, what you ate, bowel changes, temperature, rashes, urine colour and any new medicines. Drink fluids if you can, choose simple foods while nauseated, and avoid alcohol or foods that clearly worsen symptoms. Do not remove gluten for a long period before discussing testing if coeliac disease is possible, because that may affect assessment. Arrange a GP review when symptoms persist, recur or interfere with eating, sleep or normal activity.

Seek urgent help for sudden severe abdominal pain, a rigid or very swollen abdomen, repeated vomiting, blood in vomit or stool, faintness, confusion, trouble breathing, or yellow skin or eyes. Get prompt advice for dehydration, persistent fever, unexplained weight loss, or pain that steadily worsens. The severity and change over time matter more than the presence of itch alone.

Could these symptoms reflect a digestive condition, a medicine reaction or a separate skin problem? Which blood or stool tests might clarify the cause? Should I change my diet before testing? What signs should prompt same-day care?