L60-L75: Disorders of skin appendages

L72: Follicular cysts of skin and subcutaneous tissue

Follicular cysts of skin and subcutaneous tissue, as termed under ICD-10 code L72, is a group of disorders characterized by the formation of small, non-cancerous lumps beneath the skin. These cysts arise from hair follicles, the tiny sacs in skin that sprout hair. Factors such as hormonal changes, skin injuries, inflammatory skin conditions, or genetic conditions can contribute to cyst development. Common symptoms include the emergence of small, round bumps underneath the skin, which may be reddish, yellowish, or skin-toned. These bumps can appear anywhere in the body but are most often seen on the face, neck, and trunk. On some occasions, these cysts may become inflamed and painful, but generally, they do not cause other health problems. Although benign, these cysts might grow larger over time, potentially interfering with daily activities or causing aesthetic concerns.