A 10-year-old boy, Trung, was diagnosed with a stomach ulcer after experiencing persistent dull abdominal pain, burping, and heartburn for one month.

Mr. Kim, 71, must wear adult diapers when leaving home, a consequence of digestive disorders developed after years of self-medicating with antibiotics for coughs and fevers.

I used to suffer from stomach pain but enjoy cold foods. My relatives advise avoiding cold dishes, claiming they cause stomachaches and are more harmful to the stomach than hot foods. Is this true? (Ha My, 29, Hanoi)