The Link Between Tic Disorders and ADHD
These movements and/or vocalizations may occur frequently throughout the day or they may occur only occasionally. Some medications are also believed to exacerbate tics. Tics occur in about 20% of school-age children. Carol Yepes / Getty Images In children who develop tic disorders and ADHD, ADHD usually develops two to three years before tics. They also tend to co-occur with certain conditions, which may be due to shared underlying genetic factors....