Hard lumps that don’t hurt or itch when the folliculitis clears up can be considered to form keloidal folliculitis, caused by localized connective tissue proliferation. Folliculitis is a bacterial infectious skin disease that occurs in the hair follicles and their surrounding tissues, and when it occurs in the collar area, papillary hyperplasia may be present, resulting in the formation of keloidal folliculitis. Overgrowth of connective tissue within the skin may begin with the formation of small, hard, red papules, which gradually increase in size and rise above the skin surface, and the resting lesions are light in color and hard in texture. It is recommended to pay attention to skin cleanliness and hygiene, enhance the body’s immunity, if the formation of folliculitis can be timely medical treatment, follow the doctor’s instructions, and prevent trauma and infection.