Hard lumps in the stomach may be caused by stomach stones, stomach polyps, stomach cancer and other diseases, or cirrhosis of the liver and other diseases. 1. Gastric stones: Gastric stones are mainly caused by some kind of animal and plant components or hair and other materials remaining in the stomach and not being digested, and the main symptoms of the patient are epigastric discomfort, fullness, nausea, regurgitation, bad breath and other symptoms, which will lead to the symptom of a hard lump feeling in the stomach. 2. Gastric polyps: the etiology of gastric polyps is not yet clear, and is considered to be caused by Helicobacter pylori infection, bile reflux and other factors. Patients will have symptoms such as pressure pain, abdominal distension, nausea, loss of appetite, gastrointestinal bleeding, etc. If the polyp is too big, it will also lead to hard lump sensation in the stomach. 3. Gastric cancer: Gastric cancer is caused by a combination of factors, including Helicobacter pylori infection, precancerous lesions, diet and so on. The main symptoms of patients are dyspepsia, epigastric pain, anorexia, epigastric mass, etc., as well as black stools, vomiting and other symptoms. 4. Other: Cirrhosis, liver cancer and other diseases can also lead to the phenomenon of hard lumps in the stomach. When the patient has the symptom of hardness in the stomach, he should seek medical treatment in time.