ADHD or Attention deficit hyperactivity disorder is a condition that affects the behavior of people. People with ADHD can appear impatient, might have problems concentrating, and might act on impulse. Symptoms of ADHD are noticed at an early age and might become clearer when a child starts school. The cases are usually diagnosed when kids are in the age group of 6 to 12 years old. The symptoms of ADHD typically get better with age, but most adults diagnosed with the condition at a young age carry on to experience issues.