For about five or six days, I used erythromycin ointment for three days, but I didn't see any improvement.
I need to look at the photos. It may be caused by genital sebaceous cyst. It is a common skin disease. It belongs to benign tumor, which is not painful or itchy, and the effect of drug treatment is not ideal. Pay attention to keep local clean and sanitary. You can use towel hot compress or infrared physiotherapy.
If it is not painful or itchy, it is likely to be a form of sebaceous gland hyperplasia. If it is white like change, consider fat particles, which will not have too much impact. Because they are not infectious, but if it is cauliflower like change, it must not be. It is considered to be condyloma acuminatum.