Acne on the jawline is considered to be caused by folliculitis, sebaceous cysts and acne. 1. Folliculitis: If the hair follicle is infected by bacteria or fungus, it can cause folliculitis and lead to symptoms of jawline acne, which may be accompanied by pain. 2. Sebaceous cysts: The opening of the sebaceous gland of the hair follicle is blocked and the sebaceous glands are unable to drain properly, leading to the appearance of sebaceous cysts. 3. Acne: Related to the large secretion of sebaceous glands, keratinization of the sebaceous gland ducts of hair follicles, and Propionibacterium acnes infections, which can cause blockage of sebum discharge and clogging of hair follicle openings, resulting in jawline pimples. If you have symptoms of jawline acne, you should go to the hospital in time to find out the cause and take professional treatment under the guidance and advice of your doctor.