I get a lot of back pain. could it be due to like 8 car accidents in the last maybe 12 years or is it cancer?

About trauma, pain..: If in lower back, some causes of pain there include: back muscle strain, back ligament sprain, fractured vertebra (spondylolysis), slipped vertebra (spondylolisthesis), herniated disc, spinal stenosis, spinal arthritis, urine infection, kidney infection or stone; tumor in the spine, kidney, or elsewhere; fibromyalgia, etc... With such a big list of possibilities, one's doctor needs to evaluate.