What should you know about lung cancer and stomach pain?

Pain may come from the stomach, bowel, gallbladder, muscles or medication. Acid reflux, gastritis, food poisoning and gastroenteritis can cause upper abdominal discomfort, nausea or altered bowel movements. Coeliac disease, Crohn's disease and diverticular disease can also produce abdominal symptoms. Gallstones may cause stronger pain under the ribs, especially after meals.

Lung cancer can cause symptoms in the chest and airways, but stomach pain is not specific to it. If a person already has a cancer diagnosis, new pain can have several explanations, including treatment effects or a separate digestive problem. The location, timing, severity, associated symptoms and medical history guide the assessment.

Book a clinical appointment for pain that persists, returns, disrupts sleep, or occurs with weight loss, reduced appetite, vomiting, a lasting change in bowel habit or breathing symptoms. Note where the pain sits, whether food or movement changes it, and any medicines or supplements you take. Do not stop prescribed cancer treatment without speaking with the treating team. A clinician may examine you and choose tests based on the pattern rather than the cancer concern alone.

Get urgent medical help for sudden severe abdominal pain, a rigid or swollen abdomen, repeated vomiting, black or bloody stools, fainting, yellow skin, or chest pain with breathlessness. Prompt assessment is also needed when pain is worsening quickly or you cannot keep fluids down.

Ask what causes best match the pain pattern, whether medicines could contribute, which warning signs to monitor, and whether your respiratory symptoms need a separate review.