Urinary retention is a clinical manifestation of BPH, characterized by increased obstruction up to a certain level, inability to empty the bladder of all urine during urination, and the appearance of bladder residual urine. BPH is a disease in which the prostate increases in size, disrupts the normal structure and causes a series of dysfunctions, mainly due to different degrees of glandular and/or fibrous and muscular tissue hyperplasia caused by disorders of sex hormone metabolism in the elderly. The preventive measures for increased bladder residual urine are as follows: 1. Drink more water, urinate more Drink more water, drink more water will urinate more, high concentration of urine will produce some stimulation to the prostate, long-term bad stimulation is harmful to the prostate, drink more water can not only dilute the blood, but also effectively dilute the concentration of urine. The actual fact is that you will be able to get a lot more than just a few of these. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things.