Pimples in the private area may be caused by factors such as pearly penile papules, condyloma acuminatum, genital herpes, and vestibular gland cysts. 1. Penile pearly papules: a benign lesion, possibly related to poor hygiene, can localize pimples on the penis without any self-conscious symptoms and does not require special treatment. 2. Condyloma acuminatum: usually caused by human papilloma virus infection, which can lead to the appearance of vegetable-shaped swelling in the genital area, accompanied by mild itching and pain. 3. Genital herpes: a sexually transmitted disease, caused by herpes simplex virus infection, which can cause blisters to appear in the private area, accompanied by pain, fever, fatigue and other symptoms. 4. Vestibular gland cysts: may be related to infection, mechanical stimulation and other factors, can lead to vestibular gland duct blockage, easy to form cysts, accompanied by swelling, burning sensation, discomfort during sexual intercourse, fever and other symptoms. If you have acne in your private area with obvious abnormal symptoms, it is recommended that you seek timely medical examination and standardized treatment under the guidance of your doctor.