The hairs on your calves are always wrapped up in a small object, which may be keratosis pilaris. Keratosis pilaris, also known as hairy moss, is a common dermatologic disease, the onset of which is mostly related to genetic factors. The disease occurs in the limbs, common in the adolescent population, the affected area of the skin has a special rough, granular feeling, skin lesions for the skin color of the needle tip to the size of rice grains of pimples, each pimple exists independently of each other, do not merge, the pimple of the tip of the light brown keratin plugs, which may contain curly hairs. Because the disease does not affect human health, it usually does not require treatment. For those who need treatment, topical retinoid creams and urea creams can be used topically under a doctor’s supervision to improve symptoms. If the condition is serious, patients can take oral retinoids under the guidance of a doctor. Warm reminder: the treatment of keratosis pilaris drugs have different degrees of irritation, patients should be diagnosed and follow the doctor’s instructions to use drugs.