Mouth dry cracked skin is exfoliative lipitis, allergies, eczema and other causes. 1. Exfoliative labiitis: a chronic superficial inflammation of the lip mucosa of unknown origin, manifested by adherence to dry furfuraceous scales or even moist yellow-brown scaly scabs, there will be the symptom of a dry cracked and cracked skinned mouth. 2. Allergy: refers to the excessive immune response that occurs when the human body comes into contact with certain substances, mouth allergies can also lead to dry cracked skin. 3. Eczema: is caused by a variety of internal and external factors in the superficial dermis and epidermal inflammation, clinically acute lesions with herpes mound, with a tendency to ooze. In the chronic phase to mossy changes, easy to recur, will also lead to dry cracked skin. Dry and cracked mouth skin may also be seen in chronic desquamative lipitis and other diseases, if the symptoms of dry and cracked mouth skin, persistent and unrelieved, you need to consult a doctor for timely treatment.