The appearance of blackheads on the skin is generally considered to be due to acne, a chronic inflammatory skin disease involving the sebaceous glands of hair follicles, which occurs at the site of seborrhea. Skin lesions are initially conical papules consistent with hair follicles, called acne, and are divided into open blackhead acne and closed whitehead acne, or blackhead acne occulta. The following ointments are commonly used for clinical treatment: 1. Vitamin A acid preparations: By reducing sebum secretion and controlling abnormal keratinization, blackheads and acne occlusion can be relieved. For patients with severe symptoms, they can also take oral isotretinoin soft capsules and vitamin capsules to relieve local inflammation. 2. Benzoyl peroxide preparation: It has the function of killing Propionibacterium acnes and dissolving acne. Benzoyl peroxide can be added to erythromycin to make a gel to improve the efficacy. Benzoyl peroxide gel is commonly used clinically; 3. Eliminate blackheads acne closed mouth, such as Qingpeng ointment, dampicol ointment, etc.. In addition, you can also use selenium disulfide lotion, compound sulfur lotion and other drugs to inhibit the growth and reproduction of fungi, parasites and bacteria, etc., and reduce the content of free fatty acids in the skin, thereby reducing blackheads acne occlusion.