Best Sleeping Positions For Back Pain: A Position-by-Position Guide

This guide covers the best sleeping positions for lower back pain, why each one works, and which conditions respond better to specific positions. It also explains what to do if no position feels comfortable, and where your mattress fits into the picture.

Jump to:

1. Why sleeping position matters for lower back pain
2. The two types of lower back pain
3. On your side with a pillow between your knees
4. On your side in the fetal position
5. On your back with a pillow under your knees
6. In a reclined position
7. On your stomach with a pillow under your abdomen
8. Which position is best for your specific condition?
9. Your mattress and your sleeping position
10. Frequently asked questions

Why sleeping position matters for lower back pain

Your lower back carries most of your body’s weight throughout the day. At night, it needs the opportunity to rest in a neutral position, meaning a position where the natural curves of the spine are neither flattened nor exaggerated. When that doesn’t happen, the muscles, ligaments, and discs that support the lumbar region remain under load even while you sleep, which is why some people wake up more uncomfortable than when they went to bed.

The way you position your body during sleep directly affects how well your spine aligns and how much pressure accumulates in the lumbar region overnight. Poor alignment strains the facet joints that connect each vertebra, increases disc pressure, and can irritate the nerve roots that run through the lower back. Over time, repeatedly sleeping in an unsupported position can contribute to chronic morning stiffness, even in people without a diagnosed back condition.

Research published in the European Spine Journal has confirmed a bidirectional relationship between back pain and poor sleep: not only does back pain disrupt sleep, but disrupted sleep appears to heighten pain sensitivity and impair the body’s overnight tissue repair processes. Getting your sleeping position right is therefore not just about short-term comfort. It is part of the recovery process itself.

The two types of lower back pain

Before getting into positions, it helps to understand the kind of back pain you are dealing with. The two categories most commonly used clinically are:

Acute back pain is short-term discomfort, typically lasting up to a few weeks. It is often linked to a specific incident, such as lifting awkwardly or sitting in a poor posture for a prolonged period. It generally resolves without treatment, though position and support can make a significant difference to how quickly you recover and how well you sleep in the meantime.

Chronic back pain is discomfort lasting longer than three months. Around 20% of acute back pain cases progress to chronic pain. There may be no clear link to an injury, and the causes are often multifactorial. People with chronic back pain tend to benefit most from consistently maintaining a supported sleeping position, as the cumulative effect of poor positioning over many nights worsens their symptoms significantly.

You should seek medical advice if your back pain appears to stem from a specific injury, worsens or persists beyond a few days, becomes restrictive or debilitating, extends into your legs or other areas, comes with signs of infection, or accompanies other health problems.

On your side with a pillow between your knees

Physiotherapists and sleep researchers widely consider this to be the single most effective sleeping position for lower back pain. Lying on your side with a pillow between your knees keeps your hips, pelvis, and spine in natural alignment, preventing the pelvis from rotating and placing rotational stress on the lumbar discs and joints overnight.

To do it correctly:

1. Lie on either your left or right side, whichever feels more comfortable. Your shoulder should make full contact with the mattress below it.
2. Place a firm pillow between your knees. This is the critical step. The pillow prevents your upper leg from dropping and your pelvis from twisting, which is the main cause of lumbar strain in side sleepers.
3. If there is a gap between your waist and the mattress, tuck a small, thin pillow into that space for additional support. This is particularly useful for people with a more pronounced hip width.
4. Keep your knees only slightly bent. Excessive flexion at the hip can add unwanted pressure on the lower back.
5. Alternate sides regularly. Sleeping on the same side every night can lead to muscle imbalances over time and, in some cases, contribute to scoliosis in the long term.

A full-length body pillow is a useful alternative if you find it difficult to keep a standard pillow between your knees throughout the night. It supports both the knees and the upper arm simultaneously, making it easier to stay in the correct position.

The pillow between the knees is what makes this position work. Side sleeping alone without it is not particularly beneficial for the lower back; the support is what creates the alignment.

On your side in the fetal position

The fetal position involves lying on your side with your knees drawn up towards your chest. It works by opening the space between adjacent vertebrae, reducing pressure on the intervertebral discs and potentially relieving nerve irritation. This makes it particularly beneficial for conditions in which the disc space is compromised, such as herniated or prolapsed discs and spinal stenosis.

1. Curl your torso towards your knees while drawing the knees up. The aim is to create a gentle C-shape with your spine, not a tight tuck.
2. Do not curl too tightly. An overly compressed fetal position can actually aggravate back pain by creating uneven pressure along the spine, and it restricts breathing.
3. Keep a pillow between your knees here too, particularly if you have hip or sacroiliac joint pain alongside your back pain.
4. Switch sides periodically to avoid muscle imbalances.

This position is not ideal if you have arthritis in the hips or knees, as the flexion places additional load on those joints. In that case, a straighter side sleeping position with a pillow for support is preferable. For herniated disc sufferers, however, the fetal position is one of the more consistently recommended options.

On your back with a pillow under your knees

Sleeping on your back is often cited as the most mechanically sound position for spinal alignment. It distributes your body weight across the widest possible surface area, which minimises concentrated pressure on any one part of the spine. When done correctly, it places the least strain on the lumbar region of any sleep position.

1. Place a firm pillow under your knees to gently elevate your legs. This slightly flexes the hips and reduces the anterior pelvic tilt that can pull the lower back into an exaggerated arch when lying flat.
2. Support your head and neck with a pillow at a height that keeps your spine in a natural line. It should not push your head forward or let it drop back.
3. If there is a noticeable gap between the small of your back and the mattress, try placing a small rolled towel under your lower back to maintain the natural lumbar curve.

Back sleeping with supported knees is often the best position for people with generalised lower back pain and those recovering from a muscle strain. However, some people find it difficult to maintain throughout the night, particularly those who are not natural back sleepers. If you wake up having rolled onto your side, that is not a problem. The body naturally seeks comfort during sleep.

Note that sleeping on your back is generally not recommended during pregnancy, as it can reduce circulation. If this applies to you, side sleeping with a body pillow or a pregnancy wedge is the usual recommendation.

In a reclined position

This position is less discussed but worth knowing about, particularly for people who find lying completely flat uncomfortable, regardless of which position they try. A semi-reclined posture, where the upper body is gently elevated, and the knees are slightly flexed, reduces the load on the lumbar vertebrae and can relieve pressure on the facet joints and spinal discs.

It is most helpful for people with isthmic spondylolisthesis, a condition in which a vertebra slips forward on the vertebra below it, as the reclined angle reduces shear stress between the spinal segments. It is also sometimes recommended for people with spinal stenosis who find that slightly forward-leaning postures feel more comfortable during the day, as the same principle applies at night.

An adjustable bed base makes this position straightforward to maintain. A wedge pillow placed under the upper back and shoulders achieves a similar effect on a standard bed. It requires some experimentation to find the right angle, but for people who have not found relief in any flat position, it can be transformative.

On your stomach with a pillow under your abdomen

Sleeping on your stomach is consistently rated as the least favourable position for lower back pain. Lying face down flattens the natural lumbar curve, which forces the lumbar vertebrae into hyperextension and places considerable stress on the facet joints. It also requires the neck to be rotated to one side, which adds cervical tension on top of the lumbar load. Many people who stomach sleep and suffer from back pain are not fully aware that their default sleeping position is a significant contributor to their symptoms.

If you are a committed stomach sleeper and find it genuinely impossible to switch positions, there is one modification that makes a meaningful difference:

1. Place a firm pillow under your pelvis and lower abdomen before settling. This slightly elevates the hips and helps restore some of the lumbar curve that the position otherwise flattens.
2. Consider using either a thin pillow under your head or no pillow at all. A thick head pillow combined with stomach sleeping dramatically increases the strain on your cervical spine.

This position can, however, provide relief for one specific condition: degenerative disc disease. Stomach sleeping relieves some of the pressure on the space between the lumbar discs, which can make it more comfortable for those with disc degeneration. If a physiotherapist has recommended this for your specific case, the pillow modification above is still worth using to limit the hyperextension.

For most people with lower back pain, sleeping on their stomachs is a habit worth trying to break. Training yourself to sleep on your side by placing a body pillow behind your back can help prevent you from rolling forward during the night.

Which position is best for your specific condition?

Not all lower back pain is the same, and some positions that are helpful for one condition can aggravate another. The table below offers a general guide. It is not a substitute for medical advice. If you have a diagnosed spinal condition, your physiotherapist or GP is the right person to confirm which position is appropriate for you.

One thing worth noting on sciatica: which side you lie on can make a significant difference. Some people find that lying on the side with sciatica is more comfortable because it slightly opens the affected nerve canal. Others find the opposite side preferable. There is no universal rule, and comfort is the most reliable guide.

Your mattress and your sleeping position

Sleeping position and mattress work together. Even the most ergonomically correct sleeping position will not fully protect your lower back if your mattress does not provide appropriate support for your body weight and build.

Firm orthopaedic mattresses can actually cause back pain.

This is probably the most persistently repeated piece of bad advice in the mattress industry, and we hear it from customers every week. A landmark study published in The Lancet followed 313 people with chronic low back pain over 90 days and found that those sleeping on a medium-firm mattress reported significantly less pain and disability than those on a firm mattress.

The idea that a rock-hard surface is good for your back is not supported by clinical evidence and never has been. We have written a detailed guide to what the research actually says about mattresses and back pain, which is worth reading if you are considering a new mattress.

What you actually need is a mattress with the right spring tension for your bodyweight. A person weighing 10 stone needs a different level of resistance from their springs than someone weighing 16 stone. A mattress that is too firm for your weight will not allow your hips and shoulders to settle into a comfortable resting position. One that is too soft will let your spine sag, particularly in the lumbar region. Our guide to bodyweight and spring tension explains exactly how to match these correctly.

What natural fibre upholstery does for your back

The materials in your mattress affect how well it cushions the pressure points that are most active in any given sleeping position. Side sleepers, for example, experience significant concentrated pressure at the shoulder and hip. A mattress upholstered with generous layers of natural Wool and Cotton absorbs and disperses that pressure far more effectively than thin synthetic fillings, because natural fibres have a three-dimensional crimp structure that provides cushioning without losing its integrity over time.

Our handmade mattresses are built with verified GSM weights for every layer, so you know exactly how much upholstery you are getting rather than relying on marketing claims. A mattress that starts with 500g of Wool on top and 400g of Cotton beneath it is a genuinely different product from one that lists “natural fibres” on the label but provides no specification.

The Artisan Naturals (from £2,180 in a king size) and the Origins Pocket 1500 (from £1,050 in a king size) are the two mattresses we most consistently recommend to customers with lower back issues.

Both use deep natural fibre upholstery over individually pocketed springs, available across the full range of tension,s so they can be matched to your weight. The two-sided construction of our Artisan range means you are also sleeping on a mattress that lasts significantly longer without developing the body-shaped dips that undermine spinal support over time.

If you are unsure which tension is right for you, call us on 0161 437 4419, and we will work through it with you. Getting the tension right is not complicated once you know your weight, but it is the single most important decision you will make when choosing a mattress for back pain.

Frequently asked questions

What is the best sleeping position for lower back pain?

For most people, the best sleeping position for lower back pain is on your side with a firm pillow between your knees. This keeps the hips, pelvis, and spine aligned and prevents rotational stress on the lumbar discs during sleep. Back sleeping with a pillow under the knees is equally effective for those who find side sleeping uncomfortable.

Is it better to sleep on your back or side with lower back pain?

Both are good options and significantly better than sleeping on your stomach. Side sleeping with a pillow between the knees is generally more comfortable for most people and is the position most commonly recommended by physiotherapists. Back sleeping with supported knees provides excellent spinal alignment and may be preferable for those with generalised muscle pain or who are recovering from an acute strain.

Is sleeping on your stomach bad for lower back pain?

Yes, in most cases. Stomach sleeping flattens the natural lumbar curve and forces the lower vertebrae into hyperextension, adding load to the facet joints. It also requires neck rotation, which compounds the discomfort. If you cannot avoid this position, place a firm pillow under your pelvis and use a thin head pillow or none at all. The one exception is degenerative disc disease, in which sleeping on your stomach can sometimes relieve disc pressure.

Why do I wake up with more back pain than when I went to bed?

This typically indicates either a poor sleeping position, a mattress that does not provide adequate support for your body weight, or a combination of both. If your mattress is more than eight years old, or if you can feel your hips sinking into a dip when you lie on your side, the mattress is likely contributing significantly to the problem. Position changes alone may not resolve the issue if the underlying support is inadequate.

Does a firm mattress help back pain?

No, not as a rule. A landmark study in The Lancet found that people with chronic back pain sleeping on medium-firm mattresses reported significantly better outcomes than those on firm mattresses. The right tension for you depends on your body weight, not on a predetermined level of hardness. Our guide to mattresses for bad backs covers this in full.

Can a pillow between my knees really make that much difference?

Yes. When you lie on your side without a pillow between your knees, the weight of the upper leg pulls the pelvis forward and down, creating a rotational stress in the lumbar spine that persists throughout the night. A pillow neutralises this by stacking the hips. It is a small change with a disproportionately large effect on lower back comfort.

How do I stop rolling onto my stomach at night?

Place a body pillow or a firm cushion along the length of your back when sleeping on your side. This physical barrier makes it difficult to roll all the way over during sleep. It takes most people 1 to 2 weeks for side sleeping to feel natural if stomach sleeping has been their default position for years.