How you reduce back pain depends on the source of the back pain. The smartest approach is to see your family doc to determine the source. Most are muscular. Some are disc/bone spur problems. Rarely it can be an internal structure such as kidneys, major blood vessel or other organs. Let your doc sort that out.
Most pain in the back is muscular. In particular, it is the large long strap muscles of the back. IF they are weak, it will make your back hurt when you try to use them to support a lot of weight. Proper stretches and strengthening exercises will help more than anything. Have your doc send you to a physical therapy program to get you started and then follow through with the exercises religiously.
Taking pain meds or muscle relaxers can alleviate the symptoms and has a role in treating back pain. However, they don't solve the problem that is causing it in the first place. Treating the cause will go lot farther than covering it up.