There are many reasons for chin flaking, such as dry skin, contact dermatitis, eczema, fungal infections and so on. 1. Dry skin: Dry skin caused by dry air, inadequate moisturizing and low water intake can lead to flaky chin. 2. Contact dermatitis: contact with sensitizing or irritating substances may lead to flaky chin, accompanied by redness, swelling, itching and other symptoms. 3. Eczema: Inflammatory reaction of the skin caused by internal and external factors, chronic eczema may also cause rough and flaky skin, which may lead to symptoms of flaky chin. 4. Fungal infection: Fungal infection of the skin caused by ringworm, may cause flaky chin, accompanied by skin ring-like erythema, hyperpigmentation, varying degrees of itching and other symptoms. There may be other reasons for the flaky chin, so it is recommended that you go to the hospital for examination to clarify the cause of the condition and follow the doctor’s instructions for treatment.