White dirt on the male coronal area may be caused by not paying attention to hygiene and fungal glans. 1. Do not pay attention to hygiene: men usually if you do not pay attention to the glans and the coronal area cleaning, will make the local white dirt and odor, is a normal physiological phenomenon. If there is no discomfort, as long as the foreskin is often upturned and the foreskin is cleaned, you can effectively avoid infection, without special treatment. 2. Fungal glans: If men have a long prepuce or prepuce, it may lead to urine stains, secretions and other dirt deposited in the prepuce, resulting in chronic infection. Patients may experience discomfort such as itching, redness, swelling, dysuria and urgency, and need to undergo a fungal smear or culture test to confirm the diagnosis. If a male patient develops white dirt on the coronal area with discomfort, it is recommended to go to the hospital in time to clarify the cause of the problem and then treat it under the guidance of the doctor.