Common causes of elderly people not wanting to eat and stomach pain include indigestion, stomach ulcer and stomach tumor. 1. Indigestion: If the elderly have indigestion, that is, the food eaten into the stomach can not all be digested and absorbed, resulting in a large amount of food piled up in the gastrointestinal tract of the situation, so they will not want to eat. When these foods are fermented, they also release gas, which leads to bloating and pain in the stomach. 2. Gastric ulcer: because the elderly suffering from gastric ulcer will stimulate the gastric mucosa to secrete more gastric acid after eating, and the gastric acid will corrode the ulcerated surface on the gastric mucosa, resulting in stomach pain. Therefore, there will be the situation that the elderly do not want to eat and have stomach pain. 3. Stomach tumor: If there is a tumor in the stomach of the elderly, because the tumor occupies the space in the stomach, the elderly will not want to eat. And because the tumor cells erode the stomach and press the surrounding tissues, thus causing stomach pain. If the elderly do not want to eat and have stomach pain, they should go to regular hospitals in time to find out the cause of the disease and choose the suitable method for their treatment under the guidance of professional doctors.