[Short disclaimer: I am NOT a medical expert. At best, I have interned at a hospital under some surgeons and read some books. This is simply a opinion.]
While medicine has come far, there is something to be said about the mind-body connection. It seems that when there is turmoil in the mind, the body manifests turmoil.
For example, if one has a inner problem, they may feel physical headaches or even back pain.
It would suffice to say that once the inner problem is recognized / dealt with, people’s health problems can diminish.
If you do not believe me (which makes sense considering what the medieval Renaissance did to the idea of mind-body connection in medicine), I HIGHLY recommend watching this video by the deceased Dr. John Sarno of the New York University School of Medicine. It explains everything in a stunning fashion.
If the video is taken down, look up Dr. Sarno’s 20/20 ABC news segment or read one of his books.