If you ask someone who deals with back pain it is probably because of the bed that you have or your sleeping positions that are causing distress in your back muscles.
The only two ways you can fix this issue is by getting a mattress that helps you sleep better and in a comfortable position or you can change your sleeping positions that will help your back relax the muscles and be more comfortable.
Avoid sleeping on your stomach
Sleeping on your stomach is a faulty habit as it puts a lot of stress on your back and back muscles. It is harmful to your back in the long run and therefore sleeping on your side or on your back is the best option.
Use a pillow
There are multiple ways in which you can use a pillow not just to support your neck but also support your back.
You can use a pillow under your neck but also under your back or your legs to get into a relaxed position while sleeping.
If you are someone who sleeps on your sides, you can use a pillow in between your legs and pull your legs a little closer to your chest.
If you are someone who sleeps on your back, it is advisable for you to put a pillow under your knees and also support your lower back with a smaller pillow or a folded bedsheet.
If you are someone who sleeps on your stomach, it is advisable that you put a pillow under your stomach so that it gives your back a little bit more support and gives you a comfortable sleep.