It's easy to know when your child has a fever. A child's mental health problem may be harder to identify, but you can learn to recognize the symptoms. Pay attention to excessive anger, fear, sadness or anxiety. Sudden changes in your child's behavior can tip you off to a problem. So can behaviors like exercising too much, or hurting or destroying things. Some common mental health problems in children are Depression Anxiety Behavior disorders Attention deficit hyperactivity disorder Mental health problems can disrupt daily life at home, at school or in the community. Without help, mental health problems can lead to school failure, alcohol or other drug abuse, family discord, violence or even suicide. However, help is available. Talk to your health care provider if you have concerns about your child's behavior.