The short answer: Check whether your current bed is actually the problem; name where it hurts; combine sleep position and weight into a firmness range; choose foam or hybrid; then read the trial, warranty and seller lines before you order. Medium-firm is the starting point for most people.
The five steps
- Check the mattress you have. Look for a visible dip, test whether you sleep better elsewhere, and note the bed's age. A sagging bed needs replacing; a sound one may only need a topper.
- Name where it hurts. Lower back, upper back and shoulders, hips, or down one leg. Each points to a different emphasis in the bed.
- Note how you sleep and what you weigh. Side, back, stomach or a mix, and whether you are under 130 lb, 130–230 lb, or over 230 lb. Together these set your firmness range.
- Pick a firmness range, then a type. Medium-firm for most; firmer for stomach and heavier sleepers; a touch softer for light side sleepers. Then choose foam or hybrid based on heat, motion and weight.
- Read the listing like a contract. Write down the trial length, any minimum nights, who handles returns, the warranty, and who sells it. If the listing is silent or contradicts itself, ask before ordering.
Step 1: is the mattress the problem?
Signs that it is: a visible dip where you sleep, rolling toward the middle or the edge, waking stiffer than you went to bed and loosening up within half an hour, or sleeping noticeably better in hotels and at friends' homes. Signs that it may not be: pain that is worst during the day, pain that started after an injury, or pain that is the same on every surface. If the bed is under about seven years old and level, try a topper before replacing it.
Step 2: where does it hurt?
- Lower back: support under the waist and hips matters most. See lower back pain.
- Upper back and shoulders: give at the shoulder matters most. See upper back pain.
- Hips: a thick comfort layer over a supportive core. See back and hip pain.
- Down one leg: see a doctor about the leg; then see sciatica.
Step 3: position and weight
| Sleep position | Under 130 lb | 130–230 lb | Over 230 lb |
|---|---|---|---|
| Side | 4–5 | 5–6 | 6–7 |
| Back | 5–6 | 6–7 | 7–8 |
| Stomach | 6–7 | 7–8 | 8–9 |
| Combination | 5–6 | 6–7 | 7–8 |
These are starting ranges on a 10-point scale, not rules. They follow the same logic as the matcher on our home page.
Step 4: foam or hybrid?
Hybrids sleep cooler, bounce more, have firmer edges and suit heavier sleepers. Foam isolates motion better, is quieter, and usually costs less. Both can work for back pain. Details in memory foam vs hybrid.
Step 5: read the listing
On every product card we list the trial, warranty and seller exactly as the Amazon listing states them, and write "Not stated on listing" when it is silent. Do the same for any bed you consider. Two things catch people out: a minimum number of nights before you can return, and listings that contradict themselves (the Plank Firm Luxe shows two different trial lengths). When in doubt, message the seller and keep the reply.
Reader questions, answered
What should I look for in a mattress for back pain?
A firmness that suits your position and weight (medium-firm for most), support that keeps the hips from sinking, and a trial long enough to test it properly.
How do I know if my mattress is causing back pain?
A visible dip, waking stiffer than you went to bed, and sleeping better elsewhere are the strongest signs.
How long should I try a new mattress?
At least three to four weeks before judging. Choose a bed whose trial gives you that time.
This page is general shopping information, not medical advice. If your back pain is new, getting worse, or keeps you awake whatever you sleep on, talk to a clinician before you spend money on a bed. Full disclaimer.