Ichthyosis is known as “ichthyosis” in medicine, which is mainly characterized by dry skin, accompanied by ichthyoid scales and itching. 1. Dry skin: the skin in the affected area is drier than normal, thickened and cracked, which is obvious in winter and reduced in summer, and is commonly found on the side of the limbs, palms of the hands, soles of the feet, and the back, especially on the front of the lower legs. 2. Fish scale-like scales: some of them lead to grayish-white, brownish, to dark brown flaky scales on the skin and keratinous plaques on the surface. 3. Itching: Most of the affected skin is accompanied by itching symptoms of different degrees. Skin ichthyosis and other diseases, should go to the regular hospital dermatology examination as soon as possible, in accordance with the doctor’s instructions to take appropriate treatment measures.