Head lice begin life as very small (about 0.5-millimeter-in-diameter) eggs called nits, which range in color from white to brown. Nits hatch into young lice called nymphs, which take seven to 10 ...

When your scalp is itchy and white flakes are visible in your hair, you may wonder whether you have lice or dandruff. Their symptoms can overlap, making it hard to tell them apart. Head lice are ...

Head lice feed only on humans. Head lice are blood-sucking insects about the size of a sesame seed and are tan to grayish-white in color. They attach themselves to the skin of the head (scalp ...