A study says Attention Deficit Hyperactivity Disorder among children is increasing .Symptoms of ADHD include restless feeling, often fidgeting with hands or feet, running, climbing, or leaving a seat, blurting out answers before hearing the whole question, and having difficulty waiting in line .ADHD can cause significant interference in a child's academics and interpersonal relations.A of factors that may contribute to ADHD including genetics, diet and social and physical environments.The survey was conducted in Delhi-NCR, Mumbai, Ahmedabad, Kolkata, Bangalore, Chennai, Hyderabad, Chandigarh, Jaipur and Lucknow. It covered around 1,000 school teachers, who said that they have 1-3 children who are diagnosed with ADHD in every single class.