White powdery substance on the glans may be due to the presence of accumulation of foreskin scale, pearly papules on the penis and chronic prostatitis, etc. It is recommended to go to the hospital for further examination in order to clarify the cause of the disease. 1. If there is a long foreskin, circumcision and other conditions, usually do not pay attention to timely cleaning, may easily cause the accumulation of foreskin scale, resulting in the appearance of white powdery, lumpy foreign matter. 2. Penile pearly papules: If there is foreskin adhesion, foreskin scale long-term stimulation of the coronal groove, etc., may cause penile pearly papules, resulting in the glans and the coronal groove of the white small pimples, may also be presented as a white powdery. 3. Chronic prostatitis: the presence of sedentary, late at night, alcoholism and other bad habits may cause chronic prostatitis, resulting in the secretion of prostate fluid, mixed and dried on the surface of the glans, may appear as a white powder. The above symptoms may also be caused by other factors, it is recommended that patients go to the regular hospital in time for treatment and strive for early recovery.