My stomach frequently makes gurgling sounds, like boiling water. Is this due to a digestive abnormality, and when should I seek medical attention? (Ngoc Phuong, Thai Nguyen)

I often experience reflux and stomach pain. I want to have an endoscopy but fear the pain and nausea. Are there less painful endoscopic methods that can still detect stomach cancer? (Hien Le, Ho Chi Minh City)

My child is almost 6 months old and often experiences diarrhea when drinking milk. I am concerned about digestive disorders when introducing solids. Could a doctor provide guidance on an appropriate feeding method? (Yen, Ho Chi Minh City)

A reader suffering from an intestinal infection, prone to diarrhea and requiring a restrictive diet, asks about the duration of the infection and the possibility of complete recovery. (Ha, Ho Chi Minh City)