The first step to understanding the various causes of low back pain is learning about the normal design anatomy of the tissues of this area. Low back pain is a usual symptom amoung the modern civilised people.
Though there are various reasons for the lower back pain, but ussually The following are some causes for backache.
1) Backache due to diseases in the back.
2) Backache due to gynaecological problems.
3) Backache due to problems in other parts of the body.
Just to be remember, low backpain ranges from simple reasons like muscular strain to cancer of spine and hence backache should not be ignored.