The reason for lying on the back pain may be lumbar strain, lumbar spondylolisthesis, lumbar disc herniation.
1. Lumbar strain: including prolonged lying down so that the lumbar muscle fatigue and lumbar sprain or fracture once caused by the injury, lying down may pull the damaged ligaments, muscles or fascia induced pain.
2. Lumbar spondylolisthesis: lying on your back may cause the adjacent lumbar vertebrae, which are already squeezed, to slip out of place, stimulating the internal nerves and causing pain.
3. Lumbar disc herniation: lying on your back may aggravate the compression of the lumbar disc on the sciatic nerve, which may cause pain.
Other possible causes are pelvic inflammatory disease, rheumatoid, etc. It is recommended to change to standing or lying down when lying down with back pain to reduce the burden on the lower back. If the symptoms are constant or recurring, it is recommended to seek medical attention.