The best mattress for side sleepers with hip or shoulder pain

SomniSmart editorial team · Updated October 27, 2026

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Side sleeping puts most of your weight on two narrow points: the shoulder and the outside of the hip. If those points ache in the morning, the mattress is often part of the story. Here is what the research supports, what is educated rule-of-thumb, and how to turn that into a mattress choice.

Why side sleeping loads the hip and shoulder

On your back, your weight spreads across the whole length of your body. On your side, a much smaller contact area carries the same weight, so pressure concentrates at the shoulder and the greater trochanter (the bony point on the outside of the hip). A surface that is too firm pushes back hard at those points. A surface that is too soft lets the hips sink below the shoulders and bends the spine sideways. The goal is a mattress that lets the shoulder and hip sink in just enough for the spine to stay roughly straight, while the waist is still supported.

Pressure-mapping studies show how much materials matter here. In one study of 20 people lying in three postures, a latex mattress reduced peak body pressure on the torso and buttocks and spread pressure more evenly than a polyurethane foam mattress^[1]. That was one small lab study comparing two specific mattresses for six minutes per posture, so treat it as a sign that comfort-layer material changes pressure, not proof that any one material is best for everyone.

What the evidence says about firmness

The best trial evidence on mattress firmness comes from people with low-back pain rather than hip or shoulder pain. In a randomized, double-blind trial of 313 adults with chronic low-back pain, people given a medium-firm mattress had better outcomes for pain in bed, pain on rising and disability after 90 days than people given a firm mattress^[2]. Two systematic reviews reached similar conclusions: medium-firm mattresses, and mattresses the sleeper can adjust, tended to do best for comfort, sleep quality and spinal alignment^[3]^[4].

There are no large trials that recruited side sleepers with hip or shoulder pain specifically. So the honest summary is: very firm mattresses are not the answer they were once thought to be, a medium to medium-firm feel is a sensible starting point, and side sleepers usually need a little more give at the shoulder and hip than back or stomach sleepers. In the SomniSmart quiz, side sleeping moves the starting point from medium-firm toward medium, and ticking hip or shoulder pressure points adds a preference for zoned support.

Shoulder pain: which side you sleep on matters

A cross-sectional study of 83 adults with pain in one shoulder found that 67% of those who slept on one side lay on the painful shoulder, and many turned away from their partner at night^[5]. The study cannot prove that sleeping on the shoulder caused the pain, but the authors suggested it is worth testing whether changing position, even just switching sides of the bed, helps. Practical steps:

Try sleeping on the pain-free side, or partly rolled back with a pillow behind you.
Hug a pillow so the top arm does not fall forward across your chest.
Make sure your pillow fills the gap between your ear and the mattress, so your neck and shoulder are not jammed up. Our pillow loft guide explains how.
A softer comfort layer or a zoned mattress with a softer shoulder area lets the shoulder sink in without the hips over-sinking.

Hip pain: compression and position

A common cause of pain on the outside of the hip is gluteal tendinopathy. A review of the condition notes that it often interferes with sleep in side-lying, and identifies tendon compression and excessive hip adduction (the top knee dropping across the body) as key factors^[6]. That suggests two things:

Reduce compression on the painful hip: avoid lying on that side, and avoid a surface so firm that it presses hard into the bony point of the hip.
Reduce adduction when lying on the other side: a pillow between the knees keeps the top leg level, so the hip is not pulled into a stretched, compressed position.

If hip pain persists for weeks, a physiotherapist or physician can confirm the cause; load-management exercise programmes are a mainstay of treatment, and a mattress alone rarely fixes a tendon problem.

Turning this into a mattress choice

Here is how SomniSmart translates the evidence into a mattress design for a side sleeper with hip or shoulder pressure points. These are our guideline ranges, not research thresholds:

Feel: medium overall, firmer if you are heavier (see our heavy sleeper guide), a touch softer if you are light.
Comfort layers: enough soft foam or latex on top for the shoulder to sink in. For side sleepers the quiz suggests a soft-to-medium top layer of roughly ILD 10–19 (ILD measures foam softness; lower is softer).
Zoning: a softer shoulder zone and a slightly firmer centre zone can help keep the hips from sinking while still relieving the shoulder.
Support core: pocketed coils or a supportive foam base, so the softer top does not leave you bottoming out.
Curvy hips or broad shoulders: the quiz uses your waist, hip and neck measurements to push further toward zoning and pressure relief.

Couples are more complicated: a side sleeper with shoulder pain and a heavier back-sleeping partner may need different firmness on each side. The quiz scores both people and flags when a split or dual-firmness build makes sense.

When nothing on the shelf fits

Most mattresses come in one or two firmness options with no zoning choices. If the quiz shows that none of the current mattresses comes close to your ideal design, Spine Align (Chirobed), our own brand, can build a mattress to the exact firmness, layers and zoning in your result, including a different build for each side of the bed.

Try before you commit

Use the full trial period. Your body can take a few weeks to adjust to a new surface.
Track your pain on waking for a couple of weeks before and after the change. One study found that replacing beds about 9.5 years old with new medium-firm beds improved sleep quality and back discomfort over four weeks^[7].
If your current mattress has a visible dip where your hip lies, a new mattress may help more than any topper.

Not medical advice. This guide is general education. It does not diagnose, treat or cure any condition. Pain that is new, severe, getting worse, wakes you at night, or comes with numbness, weakness, fever or weight loss needs a clinician.

Take the mattress quiz (tick hip or shoulder pressure points)