Keratosis pilaris is getting worse and may be related to cold, dry weather or vitamin deficiencies. Keratosis pilaris, commonly known as “chicken skin”, is a genetically induced skin disorder with abnormal keratinization of the follicular opening. With epidermal hyperkeratosis as the main change of a group of skin diseases. When the climate is dry and cold, skin thickening aggravates the keratinization of the pores, which makes the symptoms more obvious. If you are in a dry air environment for a long time, and do not pay attention to the body skin care, resulting in skin is also very dry, aggravating the condition. Malnutrition, especially vitamin A deficiency, is more likely to lead to keratosis pilaris. Vitamin A deficiency causes generalized dryness, and the dryness exacerbates the symptoms of keratosis pilaris. There is no cure for this condition, and it is important to visit a dermatologist promptly to avoid aggravating the condition.