The common causes of itchy chin skin are contact dermatitis and eczema. 1. Contact dermatitis: If the chin is in contact with irritating or sensitizing exogenous substances, it is easy to produce contact dermatitis, resulting in localized erythema, pimples, flaking and other symptoms, and often self-conscious itchy, burning sensation. 2. Eczema: is caused by a combination of factors and inflammatory skin lesions, external factors such as changes in the living environment, climate change, food, etc. can be triggered by eczema, can make the lesions appear erythema, pimples, blisters, flaking and other manifestations, and is accompanied by a feeling of intense itching. In conclusion, if you have itchy chin skin, it is recommended to go to the regular hospital in a timely manner, to clarify the cause of the disease and timely treatment.