The International Prostate Symptom Score (IPSS) is a quantitative assessment of the severity of prostate enlargement based on 7 lower urinary tract symptoms and the frequency of symptoms. The International Prostate Symptom Score (IPSS) is based on 7 symptom scores over a 1-month period, the first 6 of which include: whether there is a frequent sensation of incomplete urination, whether the interval between micturitions is often <2 hours, whether there is urgency to urinate, whether there is intermittent micturition, whether there is a need to exert pressure to start urinating, and whether there is a thinning of the urine line. These 6 items were scored as 0, 1, 2, 3, 4, and 5 based on none, less than 1, less than half, about half, more than half, and almost every time of the 5 urinations, respectively. The 7th symptom of how many times you need to get up to urinate between going to sleep and the morning was scored as 0, 1, 2, 3, 4, 4, and 5 based on none, 1, 2, 3, 4, and 5 times respectively. The total score of the seven symptoms was counted, and if it was 0-7, it was classified as a mild symptom, 8-19 as a moderate symptom, and 20-35 as a severe symptom. IPSS can be used to assess the severity of lower urinary tract and also to assess the effect after treatment, and it is currently recognized as the best means to determine the severity of prostatic hyperplasia.