Low back pain is only rarely associated with serious illnesses. Usually the symptoms disappear within a few days.
If you have suffered from low back pain for a considerable time, you should talk to a doctor and consider treatment.
Low back pain can also be a sign of a medical emergency. If you are suddenly unable to control your bladder or bowel function, if you lose sensation in your groin area or if one or both of your legs become paralysed, you should immediately consult a doctor or call the emergency services. The symptoms mentioned could be the sign of a slipped disc, which can cause permanent damage if left untreated.