Link: Fibromyalgia Pain Revealed

So I can find it later:

Fibromyal­gia Pain Revealed

Susan Aldridge, PhD 

A brain imag­ing study shows that the pain response in fibromyal­gia is real, and dif­fers from nor­mal pain.
Fibromyal­gia is a mys­te­ri­ous dis­or­der, where peo­ple feel ten­der­ness and stiff­ness in var­i­ous parts of the body for no obvi­ous rea­son. They may also suf­fer from fatigue, headaches, gas­troin­testi­nal prob­lems and depres­sion. But some doc­tors are scep­ti­cal of the phys­i­cal basis of fibromyal­gia and believe it is a man­i­fes­ta­tion of a psy­cho­log­i­cal problem. 

A new study sug­gests that fibromyal­gia is not ‘all in the mind’ how­ev­er. Researchers in the US car­ried out func­tion­al mag­net­ic res­o­nance imag­ing stud­ies on the brains of peo­ple with the dis­or­der, com­par­ing them with healthy con­trols. Even a mild stim­u­lus, like squeez­ing the hand, caused a clear pain response in those with fibromyal­gia. The grip had to be much stronger to cause pain in the con­trols. It looks as if fibromyal­gia involves an enhanced sen­si­tiv­i­ty to pain. What’s more, dif­fer­ent brain regions were active in fibromyal­gia — open­ing up new pos­si­bil­i­ties in under­stand­ing this dif­fi­cult condition. 

Source
Arthri­tis & Rheuma­tism June 2002