Hard lumps in the stomach may be caused by indigestion, tumors, stomach cramps and some other abdominal diseases. 1. Indigestion: Overeating, consuming too much greasy, cold, spicy and stimulating food will increase the burden of gastrointestinal tract, resulting in indigestion of food and accumulation of undigested food in gastrointestinal tract, which can lead to hard lumps in the stomach. 2.Tumor:There are tumors in stomach, including gastric cancer and gastric mesenchymal tumor, etc. Gastric cancer is malignant tumor of stomach, which involves muscle layer and plasma membrane layer when the stomach is hard, especially leathery stomach, which can be touched with hard lumps; gastric mesenchymal tumor is soft tissue sarcoma of mesenchymal cells, which can be touched with hard lumps in the stomach as well. Stomach tumor can also have symptoms such as fullness and discomfort, abdominal pain, emaciation, fatigue, anemia and so on. 3. Gastroparesis: when the stomach is strongly stimulated, the patient may have gastroparesis, which may appear as a sudden contraction of spasmodic smooth muscle accompanied by gastric colic. Gastroparesis is self-limiting, and the gastric mass will subside automatically after a period of time. 4. Other abdominal diseases: enlarged spleen, enlarged liver, may also be touched in the stomach hard lumps; pancreatic pseudocysts, colon and gastric curvature of the tumor may be touched in the stomach hard lumps. Hard lumps touched in the stomach should go to the hospital to clarify the cause and be treated under the doctor’s guidance.