Urine alkali inside the male foreskin is mainly related to lack of attention to cleaning and circumcision. Urine alkali inside the foreskin is actually the result of the increase of foreskin scale, and the production of foreskin scale is mostly related to the lack of timely cleaning as well as the long foreskin. The secretions of the foreskin mixed with the tissue fragments of the foreskin and glans will form the foreskin scale, and the excessive length of the foreskin will make the foreskin scale accumulate in it. Coupled with the usual infrequent cleaning, urine will also be mixed into the foreskin scale, thus producing urinary alkali. Men with urinary alkali on their foreskin can wash the outside of their genitals with water when they take a shower every day. If the urinary alkali accumulates inside the foreskin, then the foreskin should be gently turned over, rinsed with warm water, cleaned and dried promptly, so as to avoid a moist genital environment, resulting in bacterial growth, which can cause genital inflammation. It is recommended that men pay attention to the cleanliness and hygiene of their private parts, and if they have a long foreskin, they can follow the doctor’s instructions for circumcision.