Facial keratosis pilaris occurs bilaterally on the lower jaw and cheeks, and some of the causes of redness on the cheeks may be due to localized inflammation, which can be treated with topical or oral medications. Keratosis pilaris, also known as lichen planus, is a chronic follicular keratosis pilaris, which may be associated with genetics, metabolic disorders, and vitamin A deficiency. When perifollicular keratosis is present on the face, it can appear as erythema on the cheeks due to inflammation of the lesions, leading to post-inflammatory hyperpigmentation. Although the disease generally requires no treatment, if there is a need for treatment, it can be treated with topical topical retinoic acid ointment, urea cream, salicylic acid ointment, or ammonium lactate lotion, which improves the symptoms by softening as well as dissolving the keratin; for severe cases, internal medication such as vitamin A and retinoic acid can be considered. In addition, lasers, such as photorejuvenation, can also be used to improve local redness and roughness. In the treatment of keratosis pilaris, it is recommended to standardize the treatment under the guidance of a doctor, not blindly use drugs.