Well, there is no single mattress type that works for all people with low back pain. I'm not sure whether your pain results from the mattress. Just a wild guess. Sleeping on a mattress that is too firm can cause aches and pains on pressure points. A medium-firm mattress may be more comfortable because it allows your shoulder and hip to sink in slightly. If you want a firmer mattress for back support can get one with thicker padding for greater comfort.