When to worry about unexplained weight loss with stomach cancer

Stomach cancer may reduce appetite or cause early fullness, nausea, pain and difficulty swallowing. Treatment can add taste changes, mouth soreness or vomiting. These problems can reduce intake, while the illness itself may alter how the body uses energy. Weight loss does not by itself identify the cause or show how treatment is working; your clinician may review symptoms, hydration, nutrition and examination findings.

Contact your cancer team with the timing of the loss and any change in meals, swallowing, vomiting or bowel movements. Smaller, frequent meals may be easier for some people, but choose an approach with your care team if swallowing or vomiting is present. A dietitian can suggest nourishing options and help review fluids. Keep prescribed medicines available and ask before using over-the-counter products or supplements.

Seek prompt medical advice if you cannot swallow fluids, have repeated vomiting, severe or increasing abdominal pain, black stools, dizziness, fainting or very little urine. Emergency help is needed for collapse, confusion, severe breathing trouble or inability to stay awake. Do not wait for a routine appointment when these symptoms occur.

Could my swallowing, nausea or treatment be affecting nutrition? Should I meet a dietitian? What foods or fluids are safest for me? Which symptoms require an urgent call, and how should I record changes at home?