Itchy chin may be due to excessive sweating, dry skin and other physiological factors, or consider eczema, contact dermatitis and other diseases. 1. Physiological factors: excessive sweating, dry skin, may stimulate the local skin, the symptoms of mild itching. If it is not accompanied by other uncomfortable symptoms, it is considered to be a normal phenomenon. 2. Eczema: its causes are mostly related to immune abnormalities, heredity, improper diet and other factors. Patients can appear in the local skin pimples, edema, itching and other symptoms, if the onset of the disease is more acute, itching symptoms intense, manifested as itchy chin. 3. Contact dermatitis: its cause is related to cosmetics, environmental stimuli, hair dyes and other factors. Patients can appear in the chin area itching, burning, swelling and pain and other symptoms, severe cases can be accompanied by fever, chills, headache and other symptoms. There are many causes of itchy chin, and patients are advised to identify the causes and take relevant treatment measures.