Hard itchy bumps on the chin can be caused by acne, atopic dermatitis and insect bite dermatitis, which can be relieved by medication. 1. Acne: The sebaceous glands in the chin area secrete exuberantly due to late nights, spicy diets, endocrine disorders, etc. When the pores are clogged and accompanied by bacterial infections, hard bumps may appear locally, which may be accompanied by itching. It can be treated with a light diet, regular rest and relaxation, drinking plenty of water, and topical application of Adapa Gel, Vitamin A cream, Fusidic acid cream and other medications. 2. Allergic dermatitis: hard itchy bumps can form on the chin after contact with animal fur, drugs and other allergic substances. Antihistamine drugs such as loratadine can be taken orally to help reduce the allergic reaction. 3. Insect bite dermatitis: hard itchy bumps may appear locally after mosquito bites. It can be treated by applying Benadryl cream locally. The above drugs should be used in accordance with the doctor’s instructions, chin up a hard itchy bumps should go to the hospital in a timely manner, improve the examination, clear cause of the disease under the guidance of the doctor to give targeted treatment.