Buns and hard bumps on the face may be caused by diseases such as acne, sebaceous cysts, and folliculitis. 1. Acne: It is a chronic inflammatory skin disease that involves hair follicles and sebaceous glands of the skin and results in a polymorphic rash. For example, abnormal keratinization of the cells at the mouth of the hair follicle, infection by Corynebacterium acnes, and elevated levels of androgens in the body can lead to the development of acne. It usually develops after puberty and usually has mild self-conscious symptoms. It leads to the appearance of conical papules consistent with hair follicles, which appear as long bags with hard bumps on the face. 2. Sebaceous cysts: For example, facial skin infections, facial oil secretion and other reasons, can make the gland ducts are blocked, so that sebum secreted by the sebaceous glands can not be normally discharged from the mouth of the hair follicle, the accumulation of the skin, so that the sebaceous glands with the renewal of the shedding of the cells with the formation of cysts. The result is a hard bump on the face. 3. Folliculitis: an inflammation caused by bacterial infection of the hair follicles. When folliculitis occurs, single or multiple red papules may appear, accompanied by itching, pain and other symptoms. This results in the appearance of bags and hard bumps on the face. If there are long bags and hard bumps on the face, it is recommended to go to the dermatology department of the hospital as soon as possible to clarify the cause of the disease, so as to facilitate symptomatic treatment.