The most common reasons for your lower back pain,Almost every one has experienced lower back pain at least once; it is an intense pain and its main reason is wrong posture of body. Functions of the low back include movement, structural support and protection of certain tissues. Mostly, low back pain develops between the ages of 30s and 40s due to the aging process and sedentary lifestyles. In this article, we are going to explore some common causes for such irritating pain.