Lice are tiny, wingless insects that live on the hair and scalp of humans. They feed on blood and can cause itching and discomfort. There are three main types of lice: head lice, body lice, and pubic lice. Head lice are the most common and are often spread through close contact, like sharing hats or combs. Getting rid of lice usually involves using special shampoos or treatments. It's important to wash bedding and clothing in hot water to kill any remaining lice or eggs, called nits. While lice can be annoying, they are not harmful and do not spread diseases.