Sleeping with shoulder impingement: what helps at night

How to sleep with shoulder impingement

A set-up has two jobs, and both of them are about load rather than comfort. Get your body weight off the sore shoulder, and give the arm something solid to rest on so it is not hanging or lying across you unsupported for hours on end. Everything else people try at bedtime is detail on top of those two.

If your letter, your app or your clinician used a different word, you are almost certainly reading about the same shoulder. The Dutch Orthopaedic Association guideline calls it subacromial pain syndrome, on the grounds that the old picture of a tendon being pinched under the bone does not cover what is actually going on (Diercks and colleagues, 2014). Lewis (2016) files the whole group under rotator cuff related shoulder pain, and many clinicians write rotator cuff tendinopathy. The name on the paperwork changes. The shoulder in the bed does not.

The positions themselves are written up elsewhere. Shoulder pain at night has the full set of sleeping positions and pillow set-ups, including the one that suits a back sleeper and the one that suits a side sleeper, and the shoulder impingement program has the exercises and the stages. The rest of this page is about what the night means once you are doing both.

Be clear with yourself about what a position is doing. It takes the load off a sore shoulder for a few hours, which is worth having when you are not sleeping. It changes nothing about the shoulder itself. The thing that moves the nights is what you do in the daytime, which is why none of this is a substitute for the program.

Late pregnancy overrides all of it, whatever the shoulder is doing. From about 28 weeks of pregnancy the NHS advises going to sleep on your side rather than on your back, because it says sleeping on your back after that point can double the risk of stillbirth. So use the side-lying set-up, with the sore arm resting on a pillow in front of you, and leave lying on your back until after the birth. The NHS also says not to worry if you wake up on your back: settle onto your side again and carry on.

Why is shoulder impingement worse at night?

Because the night is where this condition is at its loudest, and that is well recognized. OrthoInfo says the pain is typically at its worst at night, and as the symptoms build it lists severe night pain that may affect your ability to sleep. A shoulder that wakes you is doing the ordinary thing, not the rare thing.

A night differs from a day in two ways, and both of them matter. Nothing else is happening, so an ache you did not notice while you were working has the room to itself once the light goes off. And the night is the longest stretch your shoulder spends in one position all day. Standing at a sink, you shift your weight, drop the arm, swap hands and change position every few minutes without deciding to. Lying down, whatever position you land in holds for an hour or more, and a low load held that long adds up to more than the same load in bursts.

Whether that load is a tendon being squeezed under the bony tip of the shoulder (the acromion) is exactly the part of the old explanation the Dutch guideline says was overstated, so it is more honest to call it load than to call it pinching. Shoulder pain at night goes into what has actually been measured about lying down and a painful shoulder, and into the other conditions that produce the same complaint.

What to do with the arm if you sleep on your side

The trunk is the easy part of side sleeping. Roll onto the good shoulder and the weight problem is solved in one move. The arm is what nobody plans for, and it is the part that wakes you.

Once you are on your side, the sore arm has nowhere to be. It falls across your chest, the elbow drifts down toward the mattress, and the whole shoulder rolls forward and inward with it. Nothing is carrying any of that, so the tissue at the top of the shoulder is taking the weight of your own arm for as long as you stay there. The load is low and dull and it lasts for hours, which is why it tends to arrive as a slow ache instead of a sharp pain, and why people wake at three in the morning and not at midnight.

So the job is bulk, in front of you, at the right height. A long pillow, a folded duvet or two ordinary pillows stacked will do it. You are aiming for the forearm and the elbow both to be carried, with the upper arm finishing roughly in line with the front of your chest rather than reaching forward across the bed or dropping back behind you. Rolling a few degrees further back off the point of the shoulder usually buys more than another pillow does. Make the bundle bigger than it looks as though it needs to be: an arm that slides off it at two in the morning is one of the commonest reasons a good set-up stops working halfway through the night.

The elbow is the detail worth borrowing from the program. In isometric shoulder external rotation the elbow stays tucked against your side, because letting it travel away from the ribs changes what the shoulder is doing. The same applies in bed. An arm stretched out across the mattress is the night version of the daytime reach that hurts.

A stiff shoulder needs the opposite emphasis, so if the arm simply will not go, read sleeping with a frozen shoulder instead. There the problem is a capsule that will not let the arm travel, and the set-up is built around where the capsule objects to the arm being. Here the problem is offloading tendons and a bursa that hurt under pressure, and the set-up is built around taking the weight of the arm off them.

Does a bad night mean you did too much the day before?

Often, yes, and this is the most useful thing the night does for you. The program already asks you to judge each session on the next 24 hours rather than on how it felt at the time. The night is the sharpest version of that reading, because a shoulder that was managing a new stage during the day will often tell you the truth about it at two in the morning.

The rule on the shoulder impingement program is the one to apply: mild discomfort that eases soon after you finish is accepted, and if the shoulder is clearly worse the next day or the night pain comes back, drop back a step rather than stopping altogether. Dropping back is not the whole rule, though. Stop an exercise outright if it gives you sharp or catching pain, or pain that builds with each repetition. Going back a stage for a week is not losing ground. That is the program doing its job.

Dropping back instead of resting is deliberate. The Dutch guideline advises exercise at low intensity and high frequency, kept within the pain threshold, which is a description of light work done often rather than hard work done occasionally (Diercks and colleagues, 2014). A bad night is a signal to lighten the load and keep going, not a signal to put the arm away. The starting numbers live on the program page and on each exercise page, and your physio will adjust them to your shoulder and to what you are trying to get back to.

Look past the exercises too. A long spell with the arms overhead, a heavy bag carried on that side, or an afternoon of reaching will all show up hours later in bed, and the shoulder impingement program covers what to trim and how to carry things while the shoulder is sore. One bad night on its own proves very little, though. A flat pillow or an arm that slid off its support will do it on their own. Change one thing at a time and judge it over a week of nights rather than over one.

What the night tells you about whether the program is working

Night pain and the ache at rest are usually the first things to settle in this condition, well before you can reach a high shelf or get a hand behind your back. The order these things come back in is set out on the shoulder impingement program. What it means in practice is that quieter nights are often the earliest evidence you will get that a program is working, at a point when nothing about the daytime shoulder has changed yet. That is what physios see rather than something a trial has measured, but it is worth knowing, because most people are watching the wrong thing.

Keep a rough note for a fortnight. How many times you woke, how long it took to settle once you had moved off the shoulder, and what the day before it held. Two weeks of that tells a physio more than any attempt to remember it at the appointment, and it is the fastest way to find out whether your nights are tracking your load or ignoring it altogether.

If nothing has shifted at all, that is information too. Kulkarni and colleagues (2015) describe a pathway in which a first block of physiotherapy runs for about 6 weeks and is carried on for another 6 only when it is helping, so a stretch like that with no change in the nights is a fair point to ask for the diagnosis and the plan to be looked at again rather than to keep rearranging the bed. Shoulder pain at night has the sourced detail on how long night pain tends to last.

When can you lie on that shoulder again?

Treat it as a milestone you re-test every few weeks, not as a rule you have to live by. Nobody needs to keep a shoulder off a mattress for life, and the point of the program is to get the tissue back to tolerating ordinary things, of which lying on it is one.

Test it at the start of the night, not in the middle, when you still have the patience for it. Settle onto that side at bedtime with the pillows left built up behind you, so you are rolled a little back off the point of the shoulder rather than straight onto it. A shoulder that is ready will usually let you lie there and then start grumbling later; a shoulder that is not ready tells you inside the first few minutes, and there is nothing to be won by staying put to confirm it. Shoulder pain at night covers the question of lying on the sore side in its own right.

One exception comes from the exercise list, not the bedding. The sleeper stretch is done lying on the painful side on purpose, and it belongs late in a program rather than early. If a physio has given it to you and the position itself is still painful, say so instead of working through it.

After a shoulder operation, none of this applies. Night positions are part of the protocol your surgical team wrote, including how long you sleep in a sling and whether you may lie flat, and that plan comes before anything on this page. The rotator cuff repair rehab program and the shoulder replacement rehab program explain the usual stages so you know what to expect, and your own team decides your version of them.

What to do when it wakes you

Move off the shoulder first. Whatever else is going on, the part under load is the part you are lying on, and taking the weight off it is the one change that acts quickly. Then rebuild the support before you try to go back to sleep, because an arm that has slipped off its pillow is as likely to be the reason you woke as anything you did yesterday.

If it has not quietened after a few minutes, stand up. Upright, the arm hangs from the shoulder instead of being pressed into it, which is a different mechanical situation entirely, and that alone settles a lot of night pain. Put a light on before you stand, and sit on the edge of the bed for a moment first, because most falls at home happen in the dark and a sore shoulder is one arm less to catch yourself with. If you feel unsteady on your feet or have fallen in the past year, push up with the good arm and keep a hand on something solid for the first few steps. A minute or two of slow pendulum swings while you are there asks nothing of the shoulder muscles. Keep it short and slow. This is not a session, and the program belongs in the daytime where you can judge it.

Heat before bed suits some people, either a warm shower or a heat pack on the shoulder before you settle. Wrap the pack in a towel, rest it on the shoulder rather than lying on it, and keep it to about 20 minutes, which is what the NHS advises for heat on a sore shoulder. Take it out of the bed before you fall asleep. Do not use heat on skin that has lost feeling or cannot feel heat properly, because it can scald or burn without you noticing. Using a hot pack for shoulder pain covers the rest of the set-up and who should ask first.

When night shoulder pain needs checking rather than managing

Everything above is written for pain that answers to a position: it builds when you lie on the shoulder or let the arm hang, and it eases when you change what you are doing. One pattern does not behave like that, and it is the reason this page has a warning list rather than just a set of pillows.

Night pain that is there constantly, that no rest or change of position eases at all, and that keeps getting worse needs a doctor within a few days. If you have had cancer, now or in the past, or you are losing weight without meaning to, that becomes sooner, within a day or two, and say so when you call. If you are being treated for cancer now, contact your cancer team the same day. All three are on the list below in full, in their own words.

Numbness and tingling are the other thing to take seriously here, because they are not what a subacromial shoulder usually produces. Fingers that go numb or burn and wake you are more often a nerve problem somewhere else: why carpal tunnel is worse at night covers the wrist version, and numbness, tingling and pain down the arm sets out what the shoulder does and does not do to the arm. If you wake with a stiff, sore neck as much as a sore shoulder, stiff neck after sleeping is the better starting point. The warning list below gives the timing for pins and needles that do not go away, for numbness in part of the arm, and for weakness that is getting worse, and those timings are not negotiable against how well you slept.

Two other stories change the route. If the pain started with a fall or a pull and the arm has been weak since, that is the one history here that needs acting on quickly, and impingement, bursitis or a rotator cuff tear explains why. And if the arm will not travel however it is moved, including turning it outward with the elbow tucked at your side, that points more toward the joint capsule than the tendons. Read frozen shoulder, and book an appointment with a doctor or physio within 2 weeks rather than carrying on, because the two need different programs and the wrong one wastes months.

For everything else, the ordinary route is the right one. Two weeks is the NHS threshold for taking shoulder pain to a doctor: pain that is no better by then, pain that is worsening, or an arm that has become very hard to move. A fortnight of broken sleep counts on its own, even when the daytime shoulder feels manageable. The rotator cuff tendinopathy program has more on sleeping and working with a sore shoulder, and the shoulder pages cover the other problems in this area that can keep you awake. Anything on the list below needs acting on at the timing its own line gives.

Related exercise programs

• Shoulder impingement
• Rotator cuff tendinopathy
• Frozen shoulder

Common questions

References

1. American Academy of Orthopaedic Surgeons. Shoulder impingement/rotator cuff tendinitis. OrthoInfo. https://www.orthoinfo.org/en/diseases--conditions/shoulder-impingementrotator-cuff-tendinitis/
2. Diercks R, Bron C, Dorrestijn O, et al. Guideline for diagnosis and treatment of subacromial pain syndrome: a multidisciplinary review by the Dutch Orthopaedic Association. Acta Orthopaedica. 2014;85(3):314-322. https://doi.org/10.3109/17453674.2014.920991
3. Lewis J. Rotator cuff related shoulder pain: assessment, management and uncertainties. Manual Therapy. 2016;23:57-68. https://doi.org/10.1016/j.math.2016.03.009
4. Kulkarni R, Gibson J, Brownson P, Thomas M, Rangan A, Carr AJ, Rees JL. Subacromial shoulder pain. BESS/BOA Patient Care Pathways. Shoulder and Elbow. 2015;7(2):135-143. https://doi.org/10.1177/1758573215576456
5. NHS. Shoulder pain. Page last reviewed 22 May 2023. https://www.nhs.uk/symptoms/shoulder-pain/
6. NHS. 27 weeks pregnant: the best sleeping positions during pregnancy. Best Start in Life week by week guide. https://www.nhs.uk/best-start-in-life/pregnancy/week-by-week-guide-to-pregnancy/2nd-trimester/week-27/

Written and checked by the PocketPhysio editorial team. Last updated 2026-10-18.

This page is general education, not a diagnosis or a personal treatment plan. See a physiotherapist or doctor for advice about your own situation.