The great philosopher Hippocrates, the father of all medicine, was well known for saying, “Look well to the spine for the cause of disease.”
The reason why he said this is because the spine houses the master control system, the nervous system. That system controls every other system in the body. So, if a bone is out of place and putting pressure on a nerve, wherever that nerve goes, at the end of that nerve, that organ or body part is not going to function properly.
The point of the adjustment is to relieve that pressure, thus restoring proper nervous system function. That is really how and why a chiropractic adjustment is done.