The causes of low back pain include muscle strain, excessive workouts, job occupation, poor posture and herniated disks, states WebMD. Other causes of low back pain include kidney problems, pregnancy, bone and joint conditions, and arthritis, according to MedicineNet.
Gel-like disks that cushion the vertebrae of the spine are prone to wear and tear due to injuries and aging, explains WebMD. These disks bulge and rupture when weakened, leading to spinal nerve root pain. Excessive workouts at the gym or golf can cause low back pain due to overstretching of the muscles. Jobs that requires pulling and lifting or anything that may twist the spine may also cause low back pain.
Kidney problems such as traumatic kidney bleeding, stones and infections cause low back pain, notes MedicineNet. During pregnancy, the position of the baby in womb, mechanical stress to the lumber spine and estrogen can cause low back pain. Relaxin, a hormone that loosens the ligaments, also contributes to low back pain.
Inflammatory arthritis such as psoriatic arthritis, reactive arthritis, the arthritis of inflammatory bowel disease and ankylosing spondylitis can all cause low back pain, MedicineNet states. Heavy and overloaded backpacks and purses may also strain the low back, leading to low back pain, notes WebMD.