The MRI would show a bulging disk. There are however small joints in the spine called facet joints which can become inflamed and cause
pain and ...there are small ligaments, tendons and even very small muscles in the spine area (that help support and stabilize the column) which can become tender, swollen, and inflamed...not to mention the large "strap" muscles that run the length of the vertebral column which often go into spasm.
Spasms cause
pain. Swelling and inflamation cause
pain. Sprained structures supporting the back cause
pain. Immobility causes stiff structures which when moved cause
pain.
So the level of
pain is not surprising ...even without a herniated disk!
Treat the symptoms with heat or ice packs (or both);
NSAIDS, rest, and walking as tolerated. Prescribed muscles relaxers may help. Refrain from lifting, bending, twisting, pushing or pulling or carrying until the back heals.
Any restrictions should be in writing from your family physician or occupational health doctor.
Watch for numbness, tingling or weakness in the legs; inability to urinate; or numbness in the pelvic area (the area which would touch the saddle while riding a horse). If present, seek medical attention ASAP. This may indicate the spinal cord is being pinched.
Since the
pain has lasted beyond the typical one month mark (most acute low
back pain resolves in one month) and the MRI is negative. It is time to see a Physical Therapist to start rehabilitating the back. It is important to break the
pain-spasm-
pain cycle and allow blood flow into tense and tight soft tissue.
This allows healing. Your back should improve with time and therapy.