Lice nits can be identified by their color, shape and the way they adhere to hair, states BabyCenter. In many cases, nits resemble dandruff flakes, but unlike dandruff, they cannot be easily removed from the hair with brushing.
Nits look like small, teardrop-shaped, white flakes about the size of a grain of salt, BabyCenter explains. They are usually stuck to the hair shaft within a quarter inch of the scalp, and they are not easily removed with a comb or the fingers. Nits can also be identified by touch. They feel like grains of sand or salt close to the scalp.