Hidden pain in the triangle of the abdomen in men can be considered to be related to urinary stones, urinary infections, prostatitis, rectal diseases and other causes. 1. urinary stones: for example, when the ureteral stone in the process of stone removal, suddenly embedded in the narrowing of the ureter, can make the pain to the perineum, small abdomen radiation. In severe cases, there may even be a sudden interruption of urination and discharge of hematuria. 2. Urinary infection: for example, cystitis, which can lead to the emergence of urinary tract irritation symptoms such as frequent urination, urinary urgency, urinary pain. At the same time, it can also lead to lower abdominal swelling and pain. 3. Prostatitis: Prostatitis is a common disease in men. When prostatitis attacks, in addition to frequent urination, urinary tract irritation such as urgency, can also lead to abdominal or perineal area pain symptoms. The actual fact is that it is a very good idea to have a good deal more than just a few of them. 4. Rectal diseases: such as rectal polyps or proctitis and other diseases, can lead to pain in the lower abdomen triangle. At the same time, there can also be anxious and heavy (lower abdomen is uncomfortable, very want to relieve stool, after defecation, there is a sense of incomplete) of the situation. When men have vague pain in the lower abdominal triangle, there may be other causes, and it is recommended to actively seek medical treatment under the guidance of a medical professional.