1, examination of the abdomen: patients with prostatic hyperplasia, there is often a large amount of residual urine in the bladder, palpation can often touch the distended bladder. 2, anal finger examination: anal finger examination, is an important step in the diagnosis of this disease, most cases of prostatic hyperplasia, by this examination can make a clear diagnosis. 3, X-ray: IVU or cystourethrography, the bottom of the bladder can be seen to be elevated, with arc-shaped hypodensity shadows and an increase in the length of the posterior urethra. If combined with diverticula, tumor, stone can show filling defect. Late IVU may show vesicoureteral reflux, hydronephrosis or poor or even non-developing kidney visualization. 4.Measurement of residual urine: Measurement of residual urine is important for this disease. The amount of residual urine can indicate the severity of obstruction and is closely related to the disease. The main indicators are: maximum urinary flow rate (Qmax, normal >15ml/s), bladder capacity (normal 350-750ml for men and 250-550ml for women), contraction of the force of the forced urinary muscle, etc., which are important for the choice of treatment and prognosis of prostatic hyperplasia. It is important to determine the treatment choice and prognosis of prostatic hyperplasia. 6. Cystoscopy: This method is not used as a routine examination and is only performed when indicated. PSA measurement: The significance of PSA measurement is not for the diagnosis of BPH but for the early detection of prostate cancer. Combined with free PSA, rectal examination and ultrasound can detect most prostate cancers.