unexplained travelling muscle pain due to sports injury

Hi there

My husband had a snowboarding accident about 8 years back and pulled his hamstring. its been 8 years and no one can seem to fix him.he has seen about 20 different physio therapist, a chiropractor, and an osteopath in france and dubai.
the muscle pain attacks and stiffens his body just by doing 5 minutes of running. and now simply walking, riding a motorbike, carrying a back pack, or carrying things with his right hand hurts him. the pain went from his left leg, to his back, and now causes pain in his right arm. he also gets constant headached and neck pain.

would appreciate any insight on his condition. we are having a baby soon and he is upset, depressed, and scared he might not be able to even carry our baby.

thanks for your help!

zharah