A pimple on the root of the penis may be caused by folliculitis, warts, scabies and other diseases, the patient can be improved through general treatment, medication and physical therapy and other ways to improve. 1. Folliculitis: a pimple at the root of the penis may be related to folliculitis, patients should strengthen skin care, for bacterial infections need to follow the doctor’s instructions for the external use of antibiotics, such as mupirocin, fusidic acid, etc., which can help to kill bacteria. If it is caused by fungus, you need to apply econazole, ketoconazole and other antifungal drugs to promote recovery. 2. Condyloma acuminatum: a pimple on the root of the penis may be caused by condyloma acuminatum, the patient should avoid scratching the affected area, you can take laser treatment, cryotherapy and other ways to remove warts, to promote the recovery of skin lesions. 3. Scabies: Scabies can lead to a pimple on the root of the penis, the patient needs to keep the living environment clean, and follow the doctor’s instructions to use sulfur ointment, salicylic acid ointment, and benzyl benzoate emulsion and other drugs, which can be insecticidal, antiseptic, as well as anti-inflammatory. There are many reasons why the root of the penis grows a pimple, it is recommended that the patient go to a regular hospital, clear the cause of the disease with the doctor for standardized treatment.