Dry skin around the mouth, may be the body lack of water, or suffering from perioral dermatitis, need to analyze specific problems. 1. Body dehydration: part of the population in strenuous exercise after sweating, not timely supplementation of water, or in a dry, hot environment, the body will be relatively dehydrated, and then manifested in the peripheral tissues of the performance of water shortage, that is, dry lips peeling and so on, often accompanied by a dry mouth, tongue and other manifestations. 2. Suffer from perioral dermatitis: due to the stimulation of inflammation, the skin mucosa around the mouth will appear dry and flaky phenomenon. Often accompanied by perioral papules, papules, itching and other manifestations. There are more reasons for dry flaky skin around the mouth, if you can’t distinguish it by yourself. It is recommended to go to a regular hospital, with the help of a doctor to clarify the diagnosis as soon as possible.