Closed pimples are small pimples that are formed when the pores are closed by keratinization due to the thick skin stratum and sebum cannot be discharged. Closed pimples are more difficult to treat than open pimples, but in milder cases, they do not require treatment, and can be treated by rinsing the affected area with light salt water to prevent inflammation, and by taking good care of it on a regular basis. In severe cases, topical application of 0.025% retinoids can help eliminate it, or you can go to the hospital to see a specialist for treatment. To prevent and eliminate closed pimples, it is more important to take care of the skin. First, to avoid excessive oil secretion from the skin, the diet should not be too oily for a long time, but should be light, with less spicy and overly sweet food and more vitamin supplements. In the face washing and makeup should also be attentive, cosmetics must be cleaned up, not long-term residue on the face, if the face of the oil secretion is more vigorous, usually available to remove the oil type of cleanser. At the same time, you should also pay attention to skin moisturizing. The lack of moisture in the skin makes it easy to secrete too much oil, and usually do not squeeze the acne with your hands to avoid infection with bacteria, you should press the sides of the acne with a clean cotton swab to squeeze it out. Closed pimples can be cleaned with light salt water and cared for, and in severe cases can be treated with retinoids, and usually pay attention to skin care, especially to control the skin’s oil.