A pimple on the private parts may be caused by folliculitis, contact dermatitis, eczema and other reasons, can be treated under the guidance of the doctor. 1. Folliculitis: may be due to sweating, humidity, local infection, etc., can be localized topical roxithromycin capsules, fusidic acid cream, etc., in addition to keeping the local dry, light diet. 2. contact dermatitis: may be due to the private skin is more sensitive and contact with allergic substances, such as chemical fibers, metal, unclean clothing, etc., in order to avoid contact with allergic substances on the basis of the doctor’s guidance to exclude the relevant contraindications to topical topical pimecrolimus, tacrolimus and other drugs treatment. 3. Eczema: may be due to immune abnormalities, excessive sweating, etc., can also be accompanied by swelling, itching and other symptoms, you can use loratadine, compound glycyrrhizin and other drugs. It is recommended to go to the hospital in time for the acne on the private parts, and the above treatments need to be carried out under the guidance of the doctor.