What should you know about sudden swelling in stomach?

A swollen abdomen can reflect trapped gas, constipation or a recent meal. Gastroenteritis and Food Poisoning often add diarrhoea, vomiting, cramps or fever. Gastritis and Acid Reflux may cause upper abdominal discomfort, nausea, burning or fullness. Gallstones can cause strong pain beneath the right ribs, sometimes after fatty food. Diverticular Disease may cause lower abdominal pain and bowel changes. Crohn's Disease and Coeliac Disease can cause recurring swelling with diarrhoea, weight change or poor absorption. These patterns overlap, so the duration and associated symptoms matter.

Rest, drink fluids in small amounts and choose light meals while you observe the change. A gentle walk may help gas if movement is comfortable. Avoid alcohol, fizzy drinks and foods that repeatedly worsen symptoms. Note the swelling’s onset, location, pain, bowel movements, vomiting, fever and recent meals or travel. Do not use laxatives if you have severe pain or vomiting without medical advice. Arrange a clinician review if swelling returns, lasts, or affects eating and bowel function.

Seek emergency care for intense or worsening pain, a rigid abdomen, repeated vomiting, blood in vomit or stool, fainting, breathing difficulty, or inability to pass stool or gas. Get prompt advice for fever with abdominal pain, yellow skin or eyes, persistent vomiting, or swelling after an injury. Pregnancy, previous abdominal surgery or a known digestive disease lowers the threshold for assessment.

Which features suggest gas or constipation rather than infection or inflammation? Do my medicines, meals or bowel pattern point to a cause? Would an examination or tests help if the swelling continues?