Sebum and hair loss: what to know

Sebum is an oil made by scalp glands. When oil, sweat, dead skin and product build up, the scalp may feel greasy or itchy and may develop flakes or irritation. Scratching can break hairs or inflame follicles, but true thinning can also reflect alopecia areata, male pattern hair loss, female pattern hair loss, telogen effluvium, traction alopecia or scalp ringworm. The pattern matters: diffuse shedding, a widening part, receding temples, smooth patches and broken hairs point clinicians toward different explanations.

Wash often enough to remove oil without harsh scrubbing, rinse products well and avoid tight styles or extensions while the scalp is sore. Do not apply strong home remedies to irritated skin. Photograph the hairline and part in consistent lighting, and record when shedding began, recent illness or stress, dietary changes, medicines and family patterns. A clinician can inspect the scalp and hair shafts and may recommend targeted treatment; finasteride treatment is relevant only for selected patients after a medical discussion.

Book an assessment for persistent or accelerating thinning, clearly defined bald patches, scalp pain, marked itch, scaling, pus or broken hairs. Seek prompt medical care if hair loss occurs with fever, facial swelling or a rapidly inflamed scalp. Sudden extensive shedding deserves evaluation even when the scalp only looks oily.

Ask what pattern your loss follows, whether the scalp shows inflammation or infection, which tests are useful, and which hair-washing or treatment plan fits your diagnosis and health history.