Attention deficit hyperactivity disorder (ADHD) is a psychiatric condition that, according to data released by Mental Health America of Illinois, affects approximately 7.8% of children. In 80% of these children, this condition persists into the teenage years. Around 65% will continue to suffer from ADHD as adults. While ADHD is common, it can be treated. By recognizing the common signs of ADHD, parents can begin treating their child's condition before it begins impacting his or her development.Common ADHD SymptomsIn children, ADHD symptoms are separated into three distinct categories: inattention, impulsiveness and hyperactivity. Children with ADHD are distracted easily, spend a lot of time daydreaming, frequently lose their train of thought and have a difficult time paying attention for long periods. If your child has ADHD, he or she might be very forgetful and lose things very frequently. Many sufferers also have a hard time following instructions, staying organized, finishing important tasks and listening to people who are talking to them.ADHD also causes impulsiveness. If your child is impulsive, he or she might constantly interrupt other people, act out of turn and react very quickly. In school, your child might not raise his or her hand before answering questions. Instead, children with ADHD tend to yell out answers, sometimes before the teacher has even completed the question.Hyperactivity is the last major symptom of ADHD in children. Hyperactive children have a hard time sitting still and finishing simple tasks. Children with ADHD often fidget, bounce and move around while sitting. In their free time, these children are constantly running around, climbing on objects and going from activity to activity. Many ADHD sufferers also have difficulty staying quiet and are constantly talking or making noise.If your child exhibits many of these ADHD symptoms, you might need to consult your physician. Not every child with ADHD requires medication. Some children grow out of their condition, while others improve with the help of healthy dietary changes, exercise or behavioral therapy. If necessary, ADHD can also be treated with stimulant and non-stimulant medications that will make it easier for children to thrive both socially and academically.