Male urethral urethral erythema may be caused by over stimulation, prepuce glans, allergic factors, urethritis and other factors. 1. overstimulation: men frequent masturbation or urethra is stimulated by foreign objects, will make the urethra localized red spots, accompanied by mild pain, should reduce the stimulation, quit masturbating, can improve on their own. 2. circumcision: the presence of circumcision men with circumcision, inflammatory substances on the urethra will cause stimulation, will make the urethral region of the red spots, accompanied by glans itching, tingling and other symptoms. 3. Allergic factors: the use of irritating toiletries, so that the urethral region of the allergic reaction, will lead to the urethral region of the red spots, accompanied by itching and tingling and other symptoms. 4. Urethritis: for example, gonorrhea urethritis or non-gonococcal urethritis, can make the urethral opening area frequent inflammatory substances, so that the urethral opening area is stimulated, there can be red spots, accompanied by frequent urination, urinary urgency, urinary pain and other symptoms. Male urethral urethral red spots, and the presence of other abnormalities, should be alert for disease factors, should also seek medical examination and treatment.