4. Parkinson's d isease. Stem cells may also help those who suffer from Parkinson's, a neurodegenerative disorder that can cause tremors, stiffness, and other movement and speech problems. Studies show that embryonic stem cells can give rise to the dopamine-making neurons that Parkinson's patients lack.onetheless, here's a look at 10 health problems that stem cells might someday cure—or at least help treat: 1. Spinal c ord i njury. In January, the Food and Drug Administration OK'd its first-ever human study of a medical treatment derived from human embryonic stem cells.