Hi with your age, nothing major disease can be expected. Cheek your diet. Follow some life style changes : stop tea coffee. Avoid spicy food. Don't eat cabbage / capsicum/ don't drink / eat citrus fruits. If symptoms persists then It's better to get a upper Gastroscopy done to rule out ulcers/ erosions/ presence of H.pylori infection. By then you can take tab. PANTODAC DSR (1-0-1) HALF AN HOUR BEFORE MEAL FOR 7 DAYS. Sup. GAVISCON 10 ml THREE TIMES A DAY AFTER MEAL FOR 10 DAYS. Report the progress. Feel free to ask any further quary. Some natural way to tackle with hard stool / Constipation are-Take DABUR  NATURE CARE ISABGOL HUSK- one big teaspoon in one glass of Luke warm water after breakfast and one after dinner daily for 1 month.  Take plenty of fluids , salads in each diet. Get Flax seeds, fry it in a pan without oil, then put it in a mixi, make powder and you can take 1 teaspoon with jaggery morning and night after meal