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Knowing the difference between lice and dandruff can help heal your scalp condition properly. Lice are infectious parasites and dandruff is a self-contained scalp condition. Dandruff comes from the head, and flakes off. Dandruff is due to the excessive shedding of dead skin cells from the scalp, and lice are wingless insects (small bugs) that infest the hair and scalp. The methods of prevention and treatment also vary between lice and dandruff.
Lice. Lice are small, grayish-brown insects that live on humans. Lice bite through the skin and live on the blood of the host, another name for the infected person. Female lice lay eggs -- called nits -- that firmly attach to hair shafts. Head lice live on the scalp and are common among school children.Lice also can be found on the body (body lice) or in the pubic region (pubic lice). Head lice are spread by direct head to head contact and by sharing items including combs, brushes, scarves, and hats with an infected person.Pubic lice (crabs) are spread by having close physical contact with someone who has them.ice. Lice are small, grayish-brown insects that live on humans. Lice bite through the skin and live on the blood of the host, another name for the infected person. Female lice lay eggs -- called nits -- that firmly attach to hair shafts. Head lice live on the scalp and are common among school children.