Other scalp disorders include dandruff, ringworm, and head lice. Dandruff consists of scales of skin that fall from the scalp. It does not cause hair loss unless accompanied by an infection severe enough to damage the follicles. Ringworm is an infection caused by tiny organisms called fungi, which feed on the keratin. The hairs break off, leaving bare areas on the scalp.
Head lice are insects that suck blood from the scalp and attach their eggs to hairs.
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