A male patient who presents with lower abdominal distension can be the result of a disease. The first is prostate enlargement or prostatitis, there will also be painful urination or frequent urination, urinary urgency, as well as a distinct feeling of swelling in the anal area of the lower abdomen. The next intestinal disease, such as intestinal occupational lesions, especially in the rectum or sigmoid colon, the patient will appear lower abdominal distension and pain, also accompanied by abnormal defecation, that is, the appearance of blood in the bowel movements or stool is not formed, there will be a loss of appetite and weight loss performance. A timely fiberoptic colonoscopy can further clarify the diagnosis.