Overview
This photograph shows a nit, or tiny white egg sack, attached to the shaft of a human hair. Image courtesy of D. Scott Smith, MD, MSc, DTMH.
Review Date 2/17/2024
Updated by: Charles I. Schwartz, MD, FAAP, Clinical Assistant Professor of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, General Pediatrician at PennCare for Kids, Phoenixville, PA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.