Male lower left abdominal pressure pain may be proctitis caused by discomfort, chronic appendicitis, constipation, urinary tract diseases may also cause such a situation. 1. proctitis: with proctitis press the left lower abdomen will have obvious pain, defecation will have a feeling of falling, there will be diarrhea, blood in the stool and other uncomfortable symptoms, the anus will also be pain, some patients will be feverish, limb weakness and fatigue. 2. Chronic appendicitis: chronic appendicitis will cause vague pain in the left lower abdomen, the pain will be more obvious when pressing, the pain will travel to the abdomen around, may also cause nausea, vomiting and other symptoms, some patients will have a low-grade fever during the attack. 3. Constipation: prolonged constipation will lead to accumulation of feces, pressing the left side of the abdomen will cause pain, defecation difficulties will cause discomfort in the anus, prolonged constipation will make the patient lose weight, the body is prone to fatigue, and will cause loss of appetite. 4. Urological diseases: ① prostatitis will cause pain in the lower left abdomen, pressing will make the pain more pronounced, there will be frequent urination, urinary urgency and other undesirable symptoms, so that the patient appeared difficult to urinate; ② cystitis will also lead to pain in the lower left abdomen, severe incontinence or blood in the urine. Men with pain in the lower left abdomen, need to go to the hospital in time for examination, diagnose the cause of the disease, and actively cooperate with doctors to avoid aggravation of the condition.