If you have pain in areas that seem unrelated or that aren’t subject to the same stresses, we are looking at one of two causes:

1. Systemic – those conditions that spread through or are caused by problems in the blood.
2. Brain dysfunction – Just like a damaged or atrophied muscle, nerve groupings in the brain can be damaged, atrophied, of dysfunctional, resulting in pain or other irritating sensations in the body.