Scrotal dampness and itchiness may be caused by high local temperature of the scrotum, scrotal eczema, varicocele and other factors. 1. High local temperature of the scrotum: the male scrotum is distributed with a large number of sweat glands and sebaceous glands, when men sit for a long time, wearing tight underwear, it will make the scrotum skin in a long time in the airless environment, resulting in the local heat and sweat can not be emitted, resulting in the sweat to stimulate the scrotum skin, appearing damp, itchy and other phenomena. 2. Scrotal eczema: the etiology of the disease is not completely clear, with the body’s immune function abnormalities, mental factors, environmental factors, etc., after the onset of the patient’s scrotum near the anus, penis and other parts of the dense distribution of pimples or small blisters, accompanied by a strong sense of itching, will be scratching the lesions, the plasma will ooze out, soaking wet underwear, leading to the patient’s self-conscious scrotum damp and itchy. 3. Varicose veins of the spermatic cord: may be due to the spermatic cord vein congenital developmental abnormalities, acquired disease involvement and other factors, the patient may be due to the local vascular tortuous, unable to take away the heat, or vascular expansion leads to local heat dissipation, increased sweating, and the phenomenon of scrotal dampness, and may be accompanied by itching. In addition, genital herpes, chronic prostatitis can also cause scrotal dampness and itchy, it is recommended to go to the hospital in time to find out the cause of the disease, as soon as possible to receive treatment.