Skin dry and peeling long fish scales in winter may be ichthyosis, psoriasis, etc., should be timely consultation to identify the cause of the disease. 1… Ichthyosis: related to genetic factors, common types such as common type ichthyosis associated with autosomal dominant inheritance, which can lead to ichthyosis-like flaking skin. Symptoms will be significantly aggravated in winter and improve in summer. At present, there is no cure for ichthyosis, and the main way to alleviate the condition is to improve the skin condition. 2. Psoriasis: Influenced by genetics, immune system and living environment, it is often accompanied by silver-white scales, red plaques, itching and other symptoms. It is recommended that patients consult a doctor in time to clarify the cause of the disease and give targeted treatment.