Benign prostatic hyperplasia (BPH) is the most common benign cause of dysuria in middle-aged and older men. Histologically the prevalence of BPH increases with age, initially usually occurring after the age of 40, to greater than 50% by the age of 60, and up to 83% by the age of 80. Symptoms such as dysuria increase with age. Approximately 50% of men with histologic diagnosis of BPH have moderate to severe lower urinary tract symptoms. Two important conditions for the development of BPH must be ageing and a functioning testis. Domestic scholars investigated 26 elderly eunuchs of the Qing Dynasty and found that the prostate glands of 21 of them had become completely inaccessible or significantly atrophied, but the specific mechanism of the occurrence of BPH is not clear. Several studies have confirmed that BPH is a slowly progressive benign prostate disease, and its symptoms progressively worsen with the patient’s age, with corresponding complications. There are two main categories of symptoms of BPH, namely urinary frequency and urgency during the storage phase and urinary difficulty during the voiding phase, such as waiting to urinate, straining to urinate, thinning of the urinary line, shortening of the course of the urine as well as interruption of urination, and a feeling of incomplete urination. Long-term severe BPH can lead to urinary incontinence, renal failure, the patient appears nausea, anorexia, generalized swelling. If the elderly men combined with the above symptoms should be considered whether it is prostate hyperplasia. Of course, not all older men with the above symptoms are BPH, other diseases, such as: urethral stenosis, bladder stones, prostate cancer, bladder tumors and some neuropathy, including diabetes, etc., can also cause similar symptoms, the specific also have to go to a professional urologist to diagnosis and treatment.