ADD and ADHD can make it hard to focus & get things done. You have lots of mental energy (that's why you're so smart!) but you have a hard time directing it to one thing at a time. Many people go through their entire lives in this scatter-brained state, jumping from thing to thing, never fully concentrating on, or actually enjoying, anything. This can lead to major school & career problems (not paying attention in class, not paying attention at work, not caring about what you're working on, bouncing from job to job, career to career, etc), and problems becoming a successful adult. ...