Diagnostic Guidelines for Benign Prostatic Hyperplasia (BPH) BPH is a disorder that causes urinary obstruction in middle-aged and old-aged men, and its incidence increases with age.BPH has become one of the most common diseases in urology clinics all over the world, and its large patient population and high medical costs have become a social problem. With the continuous development of China’s national economy and the arrival of the aging society, the clinical diagnosis and treatment of BPH will probably become an important issue for the development of China’s urology clinical work and health care in the coming decades.The clinical manifestations of BPH are mainly based on different forms of lower urinary tract symptoms. There are various treatment methods for BPH, including wait-and-see, medication, minimally invasive treatment, and surgery. However, in the clinical diagnosis and treatment of BPH, there are no clear standards for judging the degree of severity of the patient’s condition, comparing the effects of various treatments, and choosing different treatments, so it is necessary to standardize the clinical diagnosis and treatment of BPH. Risk factor analysis of clinical progression of BPH Age is a high-risk factor for the clinical progression of BPH; serum PSA is one of the risk predictors for the clinical progression of BPHI, and domestic and international studies have found that it predicts the increase in prostate volume, the change in maximum urinary flow rate, and the risk of acute urinary retention and the likelihood of needing surgery; prostate volume is another risk predictor for the clinical progression of BPHI, and it can be predicted that prostate volume can be predicted for the clinical progression of BPHI. Prostate volume predicts the risk of acute urinary retention and the likelihood of needing surgery in patients with BPH; maximal urinary flow rate predicts the risk of acute urinary retention and the likelihood of clinical progression in patients with BPH; residual urine volume predicts the clinical progression of BPH, and studies have found that patients with BPH who have ≥40 ml of residual urine volume have a greater likelihood of clinical progression, and domestic scholars have found that patients with BPH develop a The incidence of hydronephrosis increased significantly with the increase of residual urine volume; Symptom score also has some value in predicting the clinical progression of BPHI, and the risk of acute urinary retention in BPH patients with I-PSS>7 is I-PSS.