The redness of the female urethra may be related to infection, polyps or caruncles, trauma and other factors. 1. Infection: female urethral redness is mostly caused by infection, women do not do a good job of daily urethral cleaning, urethral bacteria, fungi and other pathogenic microbial infections caused by inflammation, there will be redness and other symptoms. 2. long polyp or caruncle: female urethral redness may be polyp or caruncle, urethral mucosa prolapse, the local formation of polyp changes or caruncle-like changes, causing redness and swelling and other discomforts. 3. trauma: female urethral urethral urethral redness may also be localized injury, such as sex too often caused by urethral urethral urethral urethral urethral localized injury caused by redness. When the urethra is red and accompanied by other abnormal symptoms, you need to go to the regular hospital in time.