The causes of small pellets on the vulva include gonorrhea, genital herpes, warts and syphilis. 1. Gonorrhea: If infected by Neisseria gonorrhoeae, these bacteria will invade the genital organs, leading to the abnormal growth of skin tissues, and therefore the growth of small granules. 2. Genital herpes: when the patient is infected by herpes simplex virus, these viruses will damage the skin, resulting in swelling of the skin, so small particles appear. 3. Condyloma acuminatum: If the patient is infected by human papilloma viruses, these viruses can irritate the skin, resulting in skin granules. 4. Syphilis: If the human body is infected by syphilis spirochetes, these germs can damage the skin, leading to the occurrence of syphilis rash. If there is a situation where the vulva grows small particles, it is recommended to go to the hospital in time, and standardize the treatment under the guidance of the doctor.