Sleep, stress, recovery & daily habits
Sleeping on Your Back: How to Make the Switch (If It Suits You)
4-minute read · Published November 18, 2024 · Updated November 18, 2024
What this is
When you lie on one side, the shoulder on the bottom carries your weight and can be pressed for hours. Some researchers have suggested that this long pressure contributes to pain. That idea is a theory, and it has not been proven.
Back sleeping spreads pressure differently. It also lets the arms rest more freely, which many people find more comfortable. Whether it suits you depends on your shoulder, your body and your habits.
What the research says
One cross-sectional study of 83 Danish patients found that 67% of people with one-sided shoulder pain slept on the painful side [R29]. That is an association. The study cannot show that sleeping on the side causes the pain, and it is a small study. Treat it as a reason to experiment, not as a diagnosis.
NHS and British shoulder-society guidance says most shoulder pain is managed in primary care with advice and exercise. It also says that pain needing a closer look should be assessed, not just adjusted for the night [R30].
What you can do
- Try back sleeping for a short time first. While you wind down, lie on your back for a few minutes and notice how the shoulder feels. Build up gradually if it feels fine.
- Support the sore arm. A pillow along the side of the arm, or under the elbow, can keep the arm from dropping back or pressing into the mattress.
- Use a pillow under the knees. This can make lying on your back more comfortable for some people. Adjust it until it feels right.
- Keep a short sleep note. Write down the position you woke in, and how the shoulder felt in the morning. Patterns often show up within a week or two.
- Use a chair when lying down is too hard. A supportive armchair with the arm resting on a cushion lets you rest and notice how the shoulder feels.
Where ShoulderBack Pro fits — and where it doesn't
ShoulderBack Pro is a movement trainer and does not fit this topic; it does nothing for sleep position or night-time pain. General movement ideas live on the routines page, for later. For positioning and pain options at night, a doctor or physiotherapist is the better first step.
When to see a professional
See a doctor or physiotherapist promptly if you have: pain after a fall or injury with sudden weakness or loss of movement; a shoulder that looks deformed, very swollen or bruised; fever or feeling unwell alongside the pain; chest pain or breathlessness (call emergency services); constant pain that doesn't change with rest or activity; pain that wakes you most nights; numbness, tingling or weakness into the arm or hand; pain in several joints at once; or pain that hasn't improved after a couple of weeks of sensible self-care.
Try this movement
Refreshing Awareness (morning) ritual →Frequently asked questions
Is sleeping on my back better for shoulder pain?
It may be for some people. Research shows an association between one-sided shoulder pain and sleeping on the painful side, not a proven cause.
What if I roll onto my side in my sleep?
You cannot always control it, and that is normal. A pillow to hug or a pillow in front of your chest can make side-lying less painful if you end up there.
When should I get my shoulder checked?
See a clinician if pain wakes you most nights, does not change with rest, or comes with numbness or weakness.
Sources
- Zenian J (2010). Sleep position and shoulder pain. Medical Hypotheses; Kempf B, Kongsted A (2012). Association between the side of unilateral shoulder pain and preferred sleeping position: cross-sectional study of 83 Danish patients. J Manipulative Physiol Ther. https://pubmed.ncbi.nlm.nih.gov/22608285/
- NHS Greater Glasgow & Clyde, Shoulder red flags; NHS MPFT self-help, Shoulder pain; BESS/BOA pathway summary (2021). https://pmc.ncbi.nlm.nih.gov/articles/PMC7905504
