Can snow shoveling cause si joint pain or other pain in that area? day after snow shoveling moderate pain started w/ movement similar to what i experience from herniated discs in other areas of my spine. i have 5 herniated discs and severe oa?

Definitely: Snow shoveling is intense enough to cause exacerbation of SI joint OA and/or radiated pain from herniated discs and aside from other musculoskeletal damage. Getting your primary care doc involved in case pain becomes function limiting would be best.

Classic cause: Sorry, but snow shoveling can be a disaster for those with chronic back pain. You mention possibilities and your doctor can sort out. Based upon pain generator, physical therapy is the next step. A sacroiliac belt may be palliative, but not curative.