Sneezing and back pain may be caused by lumbar muscle strain, lumbar disc herniation, small joint disorder of lumbar spine and other diseases. 1. Lumbar muscle strain: sneezing will lead to elevated pressure in the abdomen, which will stimulate sudden contraction of muscles in the lumbar region and back, leading to lumbar soreness. 2. Herniated lumbar intervertebral disc: the pressure in the abdomen rises when you sneeze. When a lumbar intervertebral disc is herniated or bulged, the pressure in the spinal canal causes pressure on the discs or nerves, which causes pain and soreness. 3. Disorders of the small joints of the lumbar spine: when sneezing, if there is a bending movement, it may open the small joints of the unstable lumbar spine, causing the synovial tissues of the lumbar region to be stuck, and symptoms of lumbar soreness and lumbar pain may occur. Sneezing back pain may also be seen in diseases such as lumbar myofasciitis. If the symptoms of sneezing back pain persist without relief, you need to seek medical treatment.