Ichthyosis is a group of hereditary keratosis disorders of the skin, partly autosomal dominant, and generally does not affect life expectancy. There are many types of ichthyosis, such as common ichthyosis, sex-linked ichthyosis, lamellar ichthyosis, and congenital herpetic ichthyosis-like erythroderma, congenital non-herpetic ichthyosis-like erythroderma, etc. The symptoms of common ichthyosis are mainly manifested as skin keratinization, dryness and peeling, etc. There are usually no obvious discomfort symptoms on the surface of the skin, so there is no need to worry too much, and the symptoms can be improved by using some moisturizers in general. However, congenital herpetic ichthyosis, which is dominated by widely distributed large blisters and peeling skin, can lead to impaired barrier function on the body surface, easily infected with various bacteria and cause diseases such as sepsis, which may cause death if not rescued in time, but there is no definite time for specific life expectancy. Patients with ichthyosis are recommended to apply moisturizing cream or take vitamin A or vitamin A acid orally under the guidance of a doctor.