The primary symptom of a lower back disk injury is pain in the back, buttocks and legs, according to Mayo Clinic. There may also be a sensation of numbness, tingling or weakness in the legs. In rare cases, a lower back disk injury may cause loss of bladder or bowel control, a condition known as cauda equina syndrome, explains WebMD. This condition is dangerous and requires immediate medical attention.
Disk injuries in the spine, usually known as slipped or herniated disks, occur when the jelly-like inner core of a disk leaks through the outer part of the disk, according to Spine-health.
Herniated disks can happen on their own as the spine ages, or they can occur as a result of stress or injury to the spine, such as improper lifting or long amounts of time spent driving. Sometimes a herniated disk causes no symptoms, notes Mayo Clinic. Often, though, the herniated disk puts pressure on the nerves around it, which can cause pain to radiate into the legs where the affected nerves run. This nerve pain, known as sciatica, is sometimes accompanied by a sensation of weakness or numbness. Coughing, sneezing or certain movements of the spine may exacerbate sciatica.