Roughness and redness on the face may be the cause of follicular erythema nigricans or cosmetic contact dermatitis. 1. Follicular erythema nigricans: it belongs to the genetic class of diseases and may also be related to vitamin A deficiency. Patients with the onset of the disease manifested as follicular mouth keratin embolism, along with erythema symptoms, but no other self-conscious symptoms, can be supplemented with vitamin A under the guidance of the doctor. 2. Cosmetic contact dermatitis: If the patient uses allergenic cosmetics, it may lead to roughness and redness on the face, it is recommended to stop using cosmetics in time, and can improve desensitization treatment under the guidance of the doctor, oral antihistamines, such as loratadine tablets. If there is roughness and redness on the face, it is recommended to go to the hospital in time and follow the doctor’s instructions.