Small itchy granules on the scrotum may be related to scrotal eczema, folliculitis, contact dermatitis and other causes. 1. Scrotal eczema: often manifested in the skin on the basis of erythema, dense distribution of millet size papules, papules or small blisters, can be accompanied by obvious itching symptoms. 2. Folliculitis: bacteria and other pathogens invade the hair follicles of the scrotum, can cause local inflammatory reaction, can lead to localized pimples, can be accompanied by itching. 3. Contact dermatitis: If the scrotum skin is exposed to allergenic substances such as chemical fiber-containing underwear, it can cause abnormal immunity, resulting in localized pimples or herpes papules, often accompanied by itching. The above symptoms may also be caused by other factors, it is recommended that patients go to the regular hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor for standardized treatment, and strive for early recovery.