If a man has pain in his belly, or has frequent urination, urgent urination, incomplete urination, hematuria, redness and pus at the urethra, he must remember to go to a regular hospital urology department or male department to rule out the following diseases: Urethritis Compared to women, men are not prone to urethritis, but if men do not pay attention to hygiene in general, it can also induce urethritis, and once men have urethritis, it can lead to the emergence of The UTI can cause pain in the stomach. The UTIs are caused by gonococcus, chlamydia and mycoplasma, one of the pathogenic bacteria that cause infertility, and in general, chlamydia and mycoplasma are not obvious because they cause urethritis symptoms in the usual way, or even have no adverse symptoms at all, so many men will mistakenly think that they are healthy, thus delaying the examination and treatment. A lot of men suffering from urethritis will not only have small stomach pains and other conditions, but also painful urination and burning, etc. Therefore, men who have these symptoms must pay attention to early examination and treatment to rule out other diseases. The reason why many male patients have pain in the belly is mostly due to prostate pain, but in this part of the patient’s urine and prostate fluid culture can not find bacteria, while in the microscopic examination of the prostate fluid also can not see pus cells and white cells, but this part of the patient is accompanied by varying degrees of urinary frequency, urinary urgency and difficulty in urination. Some patients also experience pain in the perineum and scrotum, and some men also experience pain when sitting down. The most common pain is reflex pain, especially in prostatitis, which is not confined to the urethra and perineum, but also radiates to its vicinity, with lower abdominal pain being the most common. The actual fact is that you can find a lot of people who have been in the business for a long time. The way in which the pain of many men with chronic prostatitis is confused with orthopedic causes of low back pain such as myofasciitis, lumbar strain, and so on, requires some careful examination to distinguish whether the pain is caused by prostate pain or lumbar strain. The pain in the belly during sex is not only in women, but also in men during and after sex, which can lead to pain in the belly. The actual pain is usually caused by inflammation of the genitourinary system, such as chronic prostatitis, epididymitis, orchitis, in addition to varicocele, which can also lead to pain in the abdomen after sex.