The actual fact is that there are three stages of prostate hypertrophy; early, medium and late. The prostate gland is different at different times: 1, early, the bladder muscle is unable to overcome the resistance caused by the hard prostate, began to appear the phenomenon of serious obstruction of urine flow, mainly manifested as frequent urination, poor urination, thinning of the urine line (flow), straining to urinate, perineal pressure, etc. 2. In the middle stage, the symptoms of difficult urination and frequent urination are obviously aggravated gradually; the time of urination is prolonged, the urine line is thin and interruption of the urine line occurs at the same time; and residual urine appears. Acute retention of urine can occur whenever there is overwork, constipation, intercourse, cold, etc., but the degree is light and the duration is short; hematuria is easy to appear at the end of urination, residual urine is easy to be infected, and the symptoms of painful urination are obvious. The symptoms are obviously aggravated in the late stage, when the number of urination increases, most obvious with nocturia, if combined with infection or stone, urinary pain and urinary urgency appear; the difficulty in urination is progressively aggravated, each urination needs to be discharged with the help of increased abdominal pressure, or heavy urine dripping, as if incontinence, some patients often have the phenomenon of urine loss; the time of urination is obviously prolonged, the urine does not become a line, the urine journey is extremely short, sometimes wetting the sash or completely unable to self The patient may suffer from chronic urinary retention; on the basis of long-term urinary tract obstruction, urinary tract infection may easily occur, or the degree of obstruction may gradually worsen, at which time hydronephrosis, renal insufficiency, renal hypertension may occur.