Itchy bumps around the chin are often a symptom of a number of diseases, and common causes include acne, folliculitis, and allergic skin diseases. 1. Acne: Acne is a common chronic inflammatory disease of the sebaceous glands of the hair follicles, often occurring in the cheeks, jaw, trunk and other places can also be involved. Acne can be triggered by glucocorticoid drugs, dietary habits, psychological stress and other factors, and often manifests itself as pimples, pustules and itching and pain on the jaws and other places. 2. Folliculitis: Infectious folliculitis is often caused by fungi, bacteria and other microorganisms. Excessive scratching of the itchy area may lead to small breaks in the skin, which can lead to bacterial infection. Red pimples, boils and carbuncles may appear when the pores of the follicles are blocked. 3. Allergic dermatosis: Allergic dermatosis refers to the abnormal immune response caused by the infection of human skin and mucous membranes by allergens. Local skin irritation can appear after the size of red spots, blisters, often accompanied by pain and itching. When the patient appears uncomfortable, should immediately go to the hospital, follow the doctor’s instructions for treatment.