I came across this article
This is particularly dear to my heart because I suffer from Fibromyalgia. This is a condition that is poorly understood, but the symptoms are:
1. Chronic pain and increased sensitivity to pain
2. Muscular stiffness
These symptoms are caused by some kind of malfunction in the brain’s signalling system. This means I can have a massage today, but the muscular stiffness comes back due to the signals sent from the brain to the muscles.