A palpable hard lump in the left lower abdomen is mostly considered to be caused by other diseases such as bowel dryness, colon tumor, etc. It can be treated by medication and surgery. 1. Stool dryness: If the patient has a history of constipation, or if the patient feels a strip-shaped lump in the left lower abdomen without defecation, the patient can try to defecate first. If the lump disappears, it is considered to be caused by the undischarged dry stool, which may touch the sigmoid colon containing stool in the left lower abdomen, resulting in the phenomenon of lump, which is a physiological problem, and can be assisted by Kesler to defecate. 2. Colon tumor: if the lump does not disappear after defecation, especially if the patient has poor appetite, loss of weight, fatigue, and certain changes in defecation habit, which may be accompanied by blood in stool, it is necessary to consider the possibility of colon tumor, and it is recommended to go to the hospital for enteroscopy, to further clarify whether there is any space-occupying lesion in the colon. 3. Other diseases: such as megacolon, the presence of gas or feces in the megacolon may also lead to the above symptoms, but it is relatively rare in clinical practice. In addition, inflammatory diseases of the colon may lead to narrowing of the colon, which may also cause the above symptoms. It is recommended that the patient should go to the hospital for a detailed examination to confirm the cause of the disease and then have a professional doctor make a corresponding treatment plan.