Urethral red itch may be frequent sex, clothing friction and other physiological factors, may also be urethritis, glans and other diseases. 1. Physiological factors: usually patients do not pay attention to sexual abstinence, resulting in frequent sex, or wear non-cotton clothing, resulting in long-term local friction, may appear urethral urethral red itchy symptoms, is a normal physiological phenomenon. 2. Urethritis: usually gonococcal or non-gonococcal infections, and also with direct transmission, indirect transmission, age and other factors. General gonococcal urethritis patients often appear urinary frequency, urinary urgency, urinary pain, urethral urethral redness and swelling and urethral pus discharge and other symptoms, which can also be manifested in the urethral urethral red itch. The non-gonococcal urethritis patients, mostly manifested as urinary pain, urethral itching, urethral discharge increased, can also appear urethral red itch phenomenon. 3. Glans: usually due to pathogen infection, but also with alkaline substances, allergic reactions, long foreskin, frequent cleaning and other factors. Patients often appear glans skin edema, erythema, erosion and other symptoms, some patients can also be accompanied by pain during urination, itching, irritation and other phenomena, which can also be manifested as urethral urethral red itch. It is recommended that patients with symptoms of urethral erythema, timely medical care to clarify the cause of the disease, and follow the doctor’s instructions for systematic treatment.