My 36 y/o son injured his middle back, just to left of spine,working out w/weights,happened 4 years ago, got better but 2 years ago he reinjured same spot, he gets some pain there when lying down on it, what can he do? any specific exercise? serious?

Strains of the midback are quite common in people who lift heavy weights, but since his symptoms have been persistent for 2 years raises possibility of a herniated intervetebral disc.Other possibilities are early development of facet arthritis or degenerative disc disease of his spine. Has he had X-Rays of his midspine? MRI? Orthopedic consultation? Improper exercises,poor lifting technique worsen