A lump in the stomach may be caused by the following factors: exposure of subcutaneous masses, intramuscular masses, inguinal hernia, intra-abdominal masses, etc., as follows: 1. subcutaneous masses, such as sebaceous cysts, lipomas, fibroids, etc., which need to be clarified by ultrasound or CT; 2. intramuscular masses, such as leiomyosarcomas, etc., which need to be clarified by abdominal ultrasound and abdominal CT, and if necessary, surgical removal; 3. 3: inguinal hernia, if it is in the lower abdomen, it may be caused by inguinal hernia, which requires physical examination and abdominal ultrasound for clarification; 4: intra-abdominal masses, some patients have intra-abdominal growths, such as malignant tumors of the colon, mesenteric cysts, etc., which require other tests for clarification. During the examination, patients should avoid drinking beverages containing alcohol, eating spicy food, or eating pickled food, etc.