Something like prickly heat growing at the root of the penis may be caused by diseases such as scrotal eczema, circumcision and glans penis, warts and so on. 1. Scrotal eczema: related to the scrotum moisture, not dry, or stimulated by drugs, not infectious. The main symptoms are pimples and papules at the scrotum, and the surface of the skin is flushed or has exudate. 2. Scrotal inflammation: often associated with scrotal injury, diabetes and other pathological factors, the main manifestation of the skin from the pinpoint size irregular round pimples, the color of normal skin color or light brown, the skin surface is smoother and not rough. 3. Acute warts: usually occur in sexually active people, teenagers are more common, mainly through sexual contact spread. The performance of the genitals as well as the skin around the anus has mucous membrane wet, and there are small red particles, the texture is relatively soft. Regarding the penis root long like prickly heat, it is recommended to consult a doctor as soon as possible, and through the medical history, observation of symptoms, combined with the examination to identify and analyze the cause of the disease and then timely treatment.