Arm peeling and scaling may be caused by skin dehydration, dermatitis, ichthyosis and other reasons. 1. Skin dehydration: If a person has been living or working in a dry environment for a long time, it may lead to long-term dehydration of the skin, which may lead to arm peeling and scaling. 2. Dermatitis: when skin inflammation occurs, there will be symptoms of peeling and scaling, which may also be accompanied by itching and other symptoms. 3. Ichthyosis: a hereditary disease, when suffering from ichthyosis, the phenomenon of flaking and scaling on the arms will also occur, and the condition may gradually intensify in dry weather or cold season. It is recommended to go to a regular hospital in time to see a doctor for the cause of the peeling and scaling of the arms, and to standardize the treatment under the guidance of the doctor.