The vast majority of ichthyosis is caused by heredity, which is called hereditary ichthyosis, and there is no effective cure at present, and it is very difficult to be completely cured medically. If it is acquired ichthyosis, the triggering factors can be removed, and acquired ichthyosis can be cured. 1. Hereditary ichthyosis. Hereditary ichthyosis tends to occur in childhood and lasts for a lifetime, and the skin of the patient’s limb extensions and trunk is dry and rough. There is no specific treatment drug, can be used externally moisturizer, glucocorticoid ointment, Vitamin A acid ointment, oral vitamin A, Vitamin A and other drugs if necessary, can help relieve the symptoms. 2. Acquired ichthyosis. Acquired ichthyosis is secondary to other factors of ichthyosis, such as the application of special immunosuppressive drugs, tumor-induced ichthyosis. By removing the cause of the disease, it can achieve the role of eradication. It is recommended to take good care of the skin and improve the living environment. Appropriate medication should be given under doctor’s guidance to avoid serious complications.