The temperature of your skin's surface is a perfect place for them to live and breed. When a louse makes a house, most commonly in your hair, on your neck, or behind your ears, it needs to suck just a tiny little bit of blood to stay alive. If lice start living in your hair, they also begin to start a family by laying eggs, or nits . These nits contain new lice. Each nit looks like a small, oval blob that's white or clear.
Nits attach to a piece of hair close to the scalp.
Once the nits hatch, the new lice begin to suck blood, too. All of these lice attach their tiny claws into your skin to suck blood. Too much itching and scratching can lead to scalp infections. For specific medical advice, diagnoses, and treatment, consult your doctor.