Often these conditions can be treated effectively, allowing our children to grow into happy, productive adults. Types of childhood disorders. Recognizing and understanding some of the disorders common in children is the first step. Depression is considered to be the most common mental disorder. Depression is caused by a number of factors, from chemical imbalances to environmental influences to genetics.
Major depression causes people to feel hopeless, exhausted and useless.
More than changes in mood, major depression can cause problems with sleep, appetite, self-esteem, daily activities and physical health. Hyperactivity, scattered ideas, easy distraction, irritability and recklessness also occur in bipolar disorder during manic episodes. Certain fears are common in children. But when they don't go away with time, they may be a sign of anxiety disorders. Anxiety disorders come in many forms and may be experienced differently in each person.