A medium-firm mattress is generally the best choice for hip pain, though the ideal firmness depends heavily on your sleeping position, body weight, and the specific type of hip pain you’re experiencing. The common belief that a firm mattress is always better for pain turns out to be wrong. A landmark clinical trial published in The Lancet found that patients using medium-firm mattresses had significantly better pain outcomes than those on firm mattresses after 90 days.
Why Firm Mattresses Can Make Hip Pain Worse
When a mattress is too firm, it doesn’t let your hips sink in enough to maintain a neutral spine position. This is especially problematic for side sleepers, since your hip is the widest point of contact with the bed. A firm surface pushes back against the outer hip, concentrating pressure on a small area rather than distributing your weight evenly. That pressure buildup on the outside of the hip is the hallmark of mattress-related hip pain.
The Lancet trial, which studied 313 adults with chronic pain, found that medium-firm mattresses outperformed firm ones across nearly every measure. Patients on medium-firm surfaces were more than twice as likely to improve in disability scores and pain while lying in bed. They also reported less pain on rising, which is one of the most common complaints among people with hip issues.
Why Too-Soft Doesn’t Work Either
A mattress that’s too soft creates a different problem. Instead of pressing against your hip, it lets your pelvis sink too deeply, pulling your spine out of alignment. Research from the University of Central Lancashire found that people with a larger hip circumference had significantly worse spinal alignment on softer mattresses, meaning those with wider hips should avoid very soft beds. The study also showed that heavier individuals maintained more neutral spinal posture on firmer surfaces, while lighter individuals did better on softer ones.
Old mattresses often create this exact scenario. As comfort layers break down over time, you sink further into the bed than the mattress was designed for. If your mattress has visible sagging or permanent body indentations, it can no longer provide adequate support regardless of its original firmness rating.
How Sleep Position Changes the Equation
Your sleeping position is the single biggest factor in choosing the right firmness for hip pain.
- Side sleepers need the most cushioning at the hip. A soft to medium-soft mattress (roughly 3 to 5 on the standard 1-to-10 firmness scale) allows your hip and shoulder to sink in enough to keep your spine straight. Without that give, pressure concentrates directly on the bony outer hip.
- Back sleepers need moderate support. A medium-firm mattress (around 5 to 7) keeps the pelvis from sinking too far while still contouring enough to fill the natural curve of the lower back.
- Stomach sleepers need the most firmness. A surface that’s too soft lets the pelvis drop forward, hyperextending the lower back and putting strain on the hip joints. Medium-firm to firm (6 to 8) works best here.
Body Weight and Height Matter Too
The University of Central Lancashire research revealed a clear pattern: the right mattress firmness isn’t universal. Shorter, lighter people consistently achieved better spinal alignment on softer mattresses, while taller and heavier individuals needed firmer support. This makes intuitive sense. A 130-pound person doesn’t exert enough force to sink into a firm mattress properly, so their hip stays elevated and misaligned. A 230-pound person on a soft mattress sinks past the point of support, and the pelvis drops out of alignment.
If you fall outside the average weight range in either direction, you’ll likely need to adjust firmness a notch from the standard recommendations for your sleep position.
Memory Foam vs. Latex for Hip Relief
The type of material matters almost as much as the firmness level, because different foams handle pressure at the hip joint differently.
Memory foam conforms closely to your body’s curves, creating a cradled sensation that distributes weight across a wider surface area. It takes about 6 to 10 seconds to recover its shape after you move, so you settle into one position and the foam molds around your hip. This makes it particularly effective for side sleepers with hip pain, since it reduces the concentration of pressure at any single point.
Latex feels fundamentally different. It’s buoyant and responsive, meaning you sleep more on top of the mattress than inside it. Latex adjusts instantly when you shift positions, which is an advantage if you move frequently during the night. However, it doesn’t conform as deeply around the hip, so it may not relieve as much pressure for dedicated side sleepers.
Signs Your Current Mattress Is the Problem
Mattress-related hip pain has a distinct pattern. It’s located on the outside of the hip, right where your body presses against the bed surface. If your pain is deep inside the joint or in the groin, your mattress is less likely to be the primary cause.
A simple test: pay attention to whether your hip pain improves when you sleep somewhere else. If you wake up feeling better after a night on a hotel mattress or even a living room couch, your bed is likely contributing to the problem. Visible sagging, permanent body impressions, or a mattress older than 7 to 10 years are physical signs that the support has degraded past the point of usefulness.
Mattress Toppers as a First Step
If your mattress is too firm but otherwise in good shape, a topper can add the cushioning layer your hips need without replacing the entire bed. For hip pain, look for a topper that’s at least 2 to 3 inches thick. Thinner toppers won’t create enough of a pressure-relieving layer to make a meaningful difference.
Lower-density foam toppers provide more cushioning and pressure relief, making them a good match for side sleepers with hip pain on a firm mattress. Higher-density toppers offer more support and resist compression, which works better for heavier individuals or stomach and back sleepers who need to prevent excessive sinking. A topper is also a practical way to test whether softer cushioning actually helps your hip pain before committing to a new mattress.