Skin that feels rough and grainy to the touch generally refers to keratosis pilaris. Keratosis pilaris can be understood in terms of causes and treatment modalities. 1. Causes: The causes of keratosis pilaris are mainly related to heredity, in addition to vitamin A deficiency and metabolic disorders. 2. Treatment: If the rash is severe, consider taking oral vitamin E or vitamin A to reduce the symptoms of the lesions. Local can also use vitamin E cream, vitamin A acid ointment, salicylic acid ointment, urea cream, etc. to improve the symptoms, can also take oral isotretinoin to improve the symptoms. If necessary, chemical peels can be performed. It is recommended to go to a professional dermatologist and follow the doctor’s instructions. The medications mentioned above should be used in accordance with medical advice.