The cause of Keratosis Pilaris is not yet fully understood, and is considered to be related to heredity, sun exposure, chromosomal gene mutation, and possibly other factors. 1. Heredity: If parents have keratosis pilaris, their children are significantly more likely to suffer from this disease than others due to the influence of genetic factors. 2. Sun exposure: on the basis of genetic defects, if you do not pay attention to skin care, often exposed to ultraviolet rays, ultraviolet radiation, can be induced by the emergence of this disease. 3. Chromosomal gene mutation: a very small number of patients with perifollicular keratosis pilaris, considering and their own chromosomal gene mutation. 4. Other factors: vitamin deficiency, vasomotor dysfunction, endocrine disorders, cellular immune function abnormalities are also the main causes of keratosis pilaris. If you have obvious itchiness or pain in the skin, or if you find roughness, thickening, redness, swelling, pain, and scaly fine flakes, it is recommended that you go to the dermatology department of the hospital in time to get a clear picture of the cause of the disease and then get symptomatic treatment.