When the body is toxic, inflamed and swollen, it is more likely that stress, minimal physical exertion, exercise, massage and even chiropractic treatments can cause more inflammation, swelling, stiffness and neck and joint pain, because the underlying causes have not been corrected.n short, toxic blood from dairy, chocolate, cigarettes, etc. eventually causes mid-back, neck, shoulder and arm muscle spasms and joint stiffness and pain. In a similar manner, blood toxic from dairy, coffee, alcohol, cigarettes, etc. is cleaned up by the kidneys day-to-day over the years.