A white film on the inner end of the urethra is considered to be caused by the accumulation of foreskin scale, urethritis or fungal infection. 1. Circumcision buildup: men have a long prepuce, prepuce, etc., if the daily cleaning is not in place, it may lead to the accumulation of circumcision scale, in the urethra patchy white secretion, which can be manifested as a layer of urethra like a white film, usually no obvious pain symptoms. 2. Urethritis: Urethritis is divided into gonococcal urethritis and non-gonococcal urethritis. (1) Gonococcal urethritis: It is a urethral infection caused by Neisseria gonorrhea. It is characterized by redness, swelling, itching or tingling of the mucous membrane of the urethra. The urethra discharges a lot of yellowish-white purulent secretions, followed by symptoms such as frequent urination, urinary urgency and painful urination. If the treatment is not cured, chronic gonococcal urethritis can be formed, and repeated episodes of urethral connective tissue fibrosis can also cause inflammatory urethral stenosis. (2) non-gonococcal urethritis: pathogens to Chlamydia trachomatis or mycoplasma mainly. The performance of the urethra itching, painful urination and secretion of a small amount of white thin liquid, sometimes only for the scab membrane seal or dirty underwear, common in the morning. 3. Fungal infection: If the patient uses an invasive catheter urethra or the patient’s immune system is low, it may lead to fungal infection of the urethra, fungal reproduction leads to the urethral opening with a layer of white film like material, and can be accompanied by frequent urination, urinary urgency or itching symptoms. If you find a white film on the inner end of the urethra, you should go to the hospital in time to avoid delay.