Dense small granules on the face may be hives, closed pimples, and milia. Hives are caused by allergies, such as prolonged exposure to ultraviolet rays, or just changed to a new skin care product, intake of food that easily triggers allergies, resulting in pimple urticaria on the skin. Dense small granules will appear on the face and also cause itching of the skin. Closed pimples, also called whiteheads, are white pimples that form on the surface of the skin due to the buildup of keratinized cells, which cause the pores to become clogged. Corns, which are cysts that form on the epidermis of the skin and the epithelium of the appendages, are benign swellings that are prone to occur at any age. For example, skin abrasions, scratches, and inflammation can lead to the appearance of fatty grains on the skin, and the face can be densely populated with small granules. Most patients with milia do not have self-conscious symptoms and can be closely observed, usually without special treatment. If you feel that it affects the aesthetic appearance, you can go to the hospital through the cosmetic needle to pick the papules, pick out the white particles inside, which can promote its recovery.