Small particles on the scrotum may be normal hair follicles, or sebaceous cysts, folliculitis, warts and so on. 1. Normal physiological phenomenon: normal hair follicles on the scrotum can be manifested as millet-like protrusions whitish in color, and there can be hair in the center, without any symptoms. 2. Sebaceous cysts: the sebaceous glands in the scrotum are relatively abundant, and if blocked can induce bacterial infection, causing folliculitis, which can be manifested as red bumps on the surface of the scrotum accompanied by pain. 3. Folliculitis: the sebaceous gland ducts of the scrotum are clogged, and sebaceous cysts can appear, manifesting as a movable swelling under the skin of the scrotum. 4. warts: scrotum skin if infected with human papilloma virus can cause warts, can be manifested in the scrotum skin reddish reddish superfluous organisms, mostly cauliflower and corns. The small particles on the scrotum may also be caused by other factors, in the exclusion of physiological factors, you need to go to the regular hospital for further consultation, to find out the specific cause of the disease, and then give the appropriate treatment, and strive for a speedy recovery.