We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. Lice are tiny insects called parasites that spread by personal contact, as well as by sharing belongings. Children are particularly likely to catch and spread lice. There are three main types of lice. The most common symptom of any type of lice is itching.
Please understand that our phone lines must be clear for urgent medical care needs. When this changes, we will update this web site. Please know that our vaccine supply is extremely small. Bernard Cohen, M. Johns Hopkins pediatric dermatologist Bernard Cohen, M. Before you start treatment, understand how your child could have gotten head lice. The most common way head lice spread is by head-to-head contact.
Back to Health A to Z. Head lice and nits are very common in young children and their families. They do not have anything to do with dirty hair and are picked up by head-to-head contact.
Head lice pediculosis capitis are highly contagious, and the most prominent symptom of a head lice infestation includes intense scalp itching. The human head louse is a tiny insect that feeds on human blood. The female louse lays eggs nits on the hair shaft close to the scalp, and they become glued to the hair shaft. The nits hatch about 8—10 days later and begin to feed with any remaining adults.