After a recent diagnosis of a rare bacterial infection in my intestines as well as irritable bowel syndrome, I began wondering if gastrointestinal issues were one of the many comorbid conditions that plagued ADHDers. The results of my searching were, well, crappy (if you'll pardon the pun). While not much research has been done in the area, there is some evidence that GI distress is common among those with ADHD. There are many GI issues ranging from serious diagnosable conditions to occasional digestive issues, so this is a wide area. I am not a medical professional. Therefore, I will try to simply relay facts instead of making any bold claims. The only claim I intend to make is that some people with ADHD experience gastrointestinal issues.