The white color under the glans may be the accumulation of foreskin scale, the foreskin glansitis and pearly pimples, gonorrhea urethritis and other conditions, it is recommended to go to the hospital for further examination to clarify the cause of the disease. 1. Accumulation of foreskin scale, glans penis: If there is a long prepuce or prepuce, and usually do not pay attention to clean, there is likely to be the accumulation of foreskin scale, resulting in the glans, especially in the coronal groove of the glans there is a white accumulation of foreskin scale; prolonged chronic stimulation may also cause glans penis inflammation. 2. Pearly papules: if the local hygiene is poor, long-term chronic stimulation may also cause penile pearly papules, but also in the coronal groove near the reddish or white papules. 3. Gonococcal urethritis In addition, if there is unclean sex, it may lead to gonorrhea infection, triggering gonococcal urethritis, etc., the urethral orifice will appear red and swollen as well as white secretion out. It is recommended to go to the hospital for further examination to clarify the cause of the disease and timely treatment.