The most common ones are vestibular cysts, folliculitis, urethral caruncle, prepuce glans, etc. The most common ones are vestibular cysts, folliculitis, urethral caruncle, prepuce glans and so on. 1. Women’s vestibular gland is rich in sebaceous glands, if long-term inflammatory stimulation or trauma, sebaceous gland ducts are easily blocked, next to the urethral opening may appear vestibular cysts, which can be accompanied by localized redness, swelling and pain. 2. Folliculitis, bacterial infection of the hair follicles around the urethra can cause folliculitis, resulting in localized redness, swelling, pain and red bumps. 3. Urethral caruncle, a decrease in estrogen levels in women can lead to local mucosal polypoid hyperplasia to form urethral caruncle, urethral orifice can appear red bumps, if the infection can be accompanied by pain. 4. circumcision, male prepuce or prepuce is easy to produce a lot of foreskin scale, the repeated stimulation of the foreskin scale can easily lead to circumcision, which can lead to red bumps around the urethra accompanied by a sense of pain. There may be other reasons for a pimple to grow in the urine, it is recommended to consult a doctor in time.