1, urinary tract infection As the saying goes, “running water does not rot”, but patients with prostate hyperplasia often have varying degrees of incomplete urination, residual urine, residual urine in the bladder is like a pool of stagnant water, once the bacteria multiply it will cause uncontrollable infection. Urinary flow obstruction is a prerequisite for causing infection, so it is easy for urinary tract infection to occur. The most common complication of prostate enlargement is acute urinary retention, which can occur at any stage of the disease, mostly due to climate change, alcohol consumption, exertion that causes sudden congestion and edema of the prostate. The most common complication is the sudden congestion and edema of the prostate due to climate change, alcohol consumption and fatigue. 4, hematuria When bladder stones aggravate and cause bladder inflammation, hematuria may occur. 5, kidney damage When the degree of obstruction gradually increases, hydronephrosis and renal insufficiency may occur, and renal hypertension may also occur. 6, hemorrhoids, prolapse Because of the difficulty in urination, the abdominal pressure increases for a long time, so it is easy to cause complications such as hemorrhoids and prolapse. 7, urinary incontinence Excessive residual urine can cause the bladder to lose its ability to contract, and the urine retained in the bladder gradually increases. When the bladder over-expands, urine will unconsciously overflow from the urethra, and this phenomenon of urinary incontinence is called filling incontinence, and such patients must receive emergency treatment.