Under normal circumstances, blackheads will not grow into moles. Consider hyperpigmentation, epidermal cysts, etc., which can be treated by medication, laser, surgery, etc., and the appropriate treatment should be chosen according to the specific cause. 1. Hyperpigmentation: blackheads belong to a kind of acne, after the blackheads disappear, there may be hyperpigmentation manifested like moles, you can apply hydroquinone cream, azelaic acid ointment and other drugs to reduce hyperpigmentation, you can also go to the hospital to undergo laser surgery to remove the hyperpigmentation. 2. Epidermal cysts: blackheads for a long time extrusion caused by infection, will cause the follicular opening is blocked by lipid plugs, the formation of epidermal cysts, if there is inflammation and infection, you can use glucocorticosteroids to control inflammation into the lesions, such as tretinoin, mometasone furoate, etc., and after the inflammation is under control, the cysts can be excised through surgical methods. There may be other reasons for blackheads to become moles (e.g. follicular keratosis pilaris), so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy. All of the above medications should be used in accordance with the doctor’s instructions, not blindly used by themselves.