Sitting with the top of the stomach hurting may be indigestion, chronic gastritis, gastroesophageal reflux and other causes. 1. Indigestion: it may be due to eating too much greasy food or overeating, etc. resulting in food staying in the gastrointestinal tract for a long time, causing indigestion, and the space of the stomach shrinks and the pressure increases when sitting, thus causing pain. 2. Chronic gastritis: Due to the existence of long-term chronic inflammation of the gastric mucosa, pain often occurs, which may be aggravated by the pressure on the stomach when sitting. 3. Gastroesophageal reflux: due to gastric contents reflux to the esophagus part, the local stimulation, easy to cause obvious pain, in sitting may be due to pressure pain will be more obvious. Sitting on the top of the stomach pain may also be due to other causes, such as gastric ulcer, etc., if the symptoms continue to be unrelieved, you should promptly go to the hospital, after a clear diagnosis of targeted treatment.