Lice are tiny, wingless, parasitic insects that feed on your blood. Lice are easily spread — especially by schoolchildren — through close personal contact and by sharing belongings.

Several types of lice exist:

  • Head lice. These lice develop on your scalp. They're easiest to see at the nape of your neck and over your ears.
  • Body lice. These lice live in clothing and on bedding and move on to your skin to feed. Body lice most often affect people — such as homeless or transient individuals — who aren't able to bathe or launder clothing regularly.
  • Pubic lice. Commonly called crabs, these lice occur on the skin and hair of your pubic area and, less frequently, on coarse body hair, such as chest hair, eyebrows or eyelashes.

You or your child can have good personal hygiene habits and still get lice. Unless treated properly, this condition can become a recurring problem.

Symptoms Causes Prevention

Signs and symptoms of lice include:

  • Intense itching.
  • Tickling feeling from movement of hair.
  • Lice on your scalp, body, clothing, or pubic or other body hair. Adult lice may be about the size of a sesame seed or slightly larger.
  • Lice eggs (nits) on hair shafts. Nits resemble tiny pussy willow buds. Nits can be mistaken for dandruff, but unlike dandruff, they can't be easily brushed out of hair.
  • Small, red bumps on the scalp, neck and shoulders.

When to see a doctor

Usually you can get rid of lice by taking self-care steps that include using nonprescription shampoo that's specifically formulated to kill lice.

However, see your doctor if:

  • Nonprescription shampoo doesn't kill the lice — your doctor can prescribe a stronger, prescription shampoo
  • You're pregnant — don't use any anti-lice shampoo until you talk to your doctor
  • You have any infected hives or skin abrasions from scratching

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