The good news is that no matter how overwhelming it feels the challenges of attention deficit disorder are beatable. ADHD that is undiagnosed and untreated can have wide-reaching effects and cause problems in virtually every area of your life. It can also happen with Signs of adha in adults. A prospective population-based study. The symptoms of ADHD can contribute to a variety of health problems, including compulsive eating, substance abuse, anxiety, chronic stress and tension, and low self-esteem. People with ADHD are often able to concentrate on activities they enjoy.