Penile dampness may be caused by physiological factors, or it may be caused by prostatitis, scrotal eczema and other diseases. 1. Physiological factors: prolonged exposure to hot and humid environments, sedentary lifestyle, frequent wearing of tight underwear and other physiological factors can lead to localized heat and moisture in the penis that is difficult to dissipate in a timely manner, resulting in the symptoms of dampness. 2. Prostatitis: Prostatitis refers to a variety of complex causes, the common manifestations of frequent urination, urinary urgency, urinary pain and perineal discomfort, etc., can also lead to localized elevated temperature of the scrotum, the symptoms of penile humidity. 3. Scrotal eczema: Scrotal eczema can lead to localized skin flushing, itching, pimples and herpes, and in severe cases, exudate of varying degrees of severity, which can lead to penile dampness. There are many causes of penile wetness, it is recommended to seek timely medical treatment, the doctor according to the cause of the corresponding treatment.