Learning Problems Inattention can affect classroom performance and academic achievement. As the school year progresses many children with ADHD “hit rock bottom”, falling further and further behind each week until the gap is too large to catch up. Attention deficits are often brought to the attention of children in the third grade and are treated in hospitals. Because third grade is when children with ADHD most often “hit rock bottom,” it is widely believed that third graders are able to do more and more tasks independently, and as a result, their homework load increases. Many children also seek treatment after they graduate from elementary school and move on to middle school, when the amount of classes and teachers increases and many children with ADHD who were able to keep up in elementary school are not able to cope at all in middle school. Confrontation and Conduct Problems Hyperactivity and impulsivity symptoms may cause children with ADHD to often break school discipline, house rules, or interpersonal rules, and to get into more trouble than children with attention deficits alone, with significantly more of them combining confrontation and conduct problems. These include refusal to obey or active disobedience to adults, irritability, temper tantrums, holding grudges or revenge, hostility, resentment, and even aggressive and disruptive behaviors such as stealing, truancy, running away from home, lying, setting fires, animal cruelty, and bullying others. Emotional instability About 20% of children with ADHD may experience severe and intense emotional episodes, with impulsive and reckless outbursts of physical or verbal aggression, seriously affecting daily life and interpersonal relationships.The co-morbidity rate between ADHD and mood disorders (also known as affective psychiatric disorders) is 15% to 75%. Some children with ADHD co-occurring with mood disorders experience depressed mood for several hours a day for 2 weeks or more, during which time there is unresponsiveness, lethargy, and difficulty in concentrating, leading to abandonment of learning. ADHD also often co-occurs with mood disorders, in which children exhibit feelings of low self-esteem, shyness, social withdrawal, anxiety, crying, hypersensitivities, and depression, among other things. Parents should not think that pediatric ADHD is just a child’s bad habits, but also need formal treatment, otherwise the harm should not be underestimated.