Cystitis in men is a relatively common disease in urinary tract infections. The main symptoms are local inflammatory manifestations and systemic symptoms, which in addition can cause co-morbid symptoms. For male friends to be more troubled. 1, the local inflammation is mainly urethral irritation, frequent and painful urination, most of the pathogens are mycoplasma and chlamydia and bacteria. These pathogenic infections can lead to secretions from the urethra, which are sticky. The bladder is also innervated by the lumbosacral nerves, and repeated inflammation can cause pain in the lower back, unlike the back pain caused by exertion, and the symptoms do not ease when resting flat on the back. 2, combined with other urinary tract infections, such as prostate enlargement, prostatitis. The prostate disease will in turn aggravate the symptoms of urethral irritation. The heavier inflammation can cause systemic infections, with patients experiencing fever and physical weakness. Chronic inflammation of the bladder also has an effect on sexual function, leading to impotence or premature ejaculation. Urinalysis and ultrasound examination of the bladder are used to determine the severity of the disease and to treat it with aggressive medication. By understanding the symptoms of cystitis, it can be seen that inflammation of the bladder is still a major health risk. So early diagnosis and timely treatment is needed.