What is Attention Deficit Hyperactivity Disorder (ADHD, ADD)?
Attention deficit hyperactivity disorder (ADHD) is one of the most common childhood behavior problems and can continue through adolescence and adulthood. Symptoms include difficulty staying focused and paying attention, difficulty controlling behavior, and hyperactivity (over-activity).
ADHD has three subtypes:
Children with this subtype are less likely to act out or have difficulties getting along with other children. They may sit quietly, but they are not paying attention to what they are doing. Therefore, the child may be overlooked, and parents and teachers may not notice that he or she has ADHD.
Most adults with ADHD are this type.
Most children have the combined type of ADHD.
Scientists are not sure what causes ADHD, although many studies suggest that genes play a large role. Like many other syndromes, ADHD probably results from a combination of factors. In addition to genetics, researchers are looking at possible environmental factors…