Ichthyosis is clinically divided into many kinds, and the main characteristics are dry skin and ichthyosis-like flaking on the skin, and the disease is greatly related to genetic factors. The most common clinical condition is common ichthyosis, and in general, patients with common ichthyosis only have dry skin and slight flaking on the surface in winter, which can be significantly relieved by using some skin care products, but most people have no way to completely cure ichthyosis. The principle of treatment for ichthyosis is based on topical medication, which is to keep the skin mildly moist, as well as lightly exfoliating. Urea ointment is usually applied topically to keep the skin moist, and vitamin A ointment is applied topically to soften the keratin, and sometimes glucocorticoid ointment can be used clinically to increase the efficacy.