Uncontrollable Hyperactivity, diagnosed as ADHD. Hyperactivity is natural as I see it, however I could not control myself as a child. I will always be hyperactive, but now I have a decent amount of self control.
Anxiety. Still a weirdo, no longer worried about it.

"Genetic" Depression. One day I noticed that happiness was something I must work for, been fine ever since.
Acid reflux, I would wake up in the middle of the night holding my burning throat. If I had not found my way I would have burnt a hole in my esophagus, developed fungal growths(cancer) to repair, and then they would have diagnosed my with "cancer" and killed me with drugs and radiation.
Cavities. I had six, now I have none. They recommended I use fluoride wash, so I never returned. Just one small sugar sensitive spot now.