How Big Can Head Lice Get?

Head lice are parasites that live in the scalp. They are usually found close to the scalp and behind the ears, but they can also be found on the eyelashes and eyebrows. Because they feed on human blood, they usually stay close to the scalp. However, if you find head lice on your hair, it is crucial to treat them immediately.

Adult head lice measure two to three millimeters in length and are tan to grayish white. They have six legs, each with a claw that can latch onto your hair. Adult lice can live for up to 30 days on your head before dying. They can lay six eggs per day.

Head lice can be very contagious. Unlike other bugs, they are not able to jump or fly. They cling to hair and spread from one person to another through head-to-head contact and the sharing of personal items. While you cannot spread the disease to other people’s pets, it is best to treat the problem immediately and prevent further spread.

While there are topical insecticides that can kill head lice, they are not completely effective. Often, a second application is necessary. Always consult your doctor before using any topical cream on your child.

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