Blackheads are a type of acne and are classified as mild acne according to the severity of the acne. Mild acne is mainly treated with topical medications, such as 0.025% to 0.05% retinoic acid cream or gel. This type of medication helps to dissolve and eliminate acne, but there is a mild irritation reaction during the initial use of the medication. Therefore, it is important to start with a low concentration of retinoic acid and use it once a day at night. After the symptoms improve, they can be used topically once a week. Patients who refuse to use the medication can go to the local hospital to squeeze out the contents with a special acne squeezer, or go to the local hospital for fruit acid treatment.