Back Pain When Lying Down: Causes and Positions

Written by Zita Sham, Fairuuz Saleh and Shiv Mohan Banka, Principal Physiotherapists at Phoenix Rehab.Clinically reviewed by Louise Yow, Principal Physiotherapist & Director, AHPC A1300363H.Last reviewed 7 November 2026.

Lower back pain when lying down is usually mechanical: a position that arches or flattens the lower back, a mattress that sags or is too hard, or a stiff, irritated back that complains once it stops moving. That kind usually eases when you change position or get up. Pain that wakes you whatever position you lie in, or morning stiffness that lasts more than 30 minutes and eases with movement, needs a doctor’s opinion.

At Phoenix, back pain is assessed and treated by our physiotherapy team at five clinics: Orchard, Tampines, Serangoon, Tanjong Pagar and Jurong East. The first visit is an Assessment & Treatment: one 45-minute appointment, one to one with a physiotherapist, $230 nett, no GST. No referral needed. WhatsApp 8336 6009 and we reply with a clinic and two times.

Get Assessed & Treated

Key takeaways

Lower back pain when lying down is usually mechanical and eases when you change position or get up.
Which position hurts, and which one eases it, says a lot about what the back is reacting to.
In a trial of 313 people with long-term low back pain, a medium-firm mattress did better than a firm one for pain in bed and on getting up.
Back pain that is worse after rest, better with exercise, wakes you in the second half of the night and started before 40 can be inflammatory, and that is a doctor’s assessment.
Pain at night whatever position you lie in, with weight loss, fever or a history of cancer, means a doctor first.

First, the signs that mean a doctor, not this page

Call 995 if sudden, severe back pain comes with pain in the chest or belly, sweating or feeling faint.
Go to the emergency department now if you have any change in bladder or bowel control, numbness around the back passage or genitals, weakness in both legs, or back pain after a fall or accident, especially if you are older or have thin bones.
See a doctor the same day if back pain comes with a fever or chills, or you have recently had an infection, an operation or an injection in the back.
See a doctor soon if the pain is there at night whatever position you lie in, you are losing weight without trying, you have had cancer, this is new back pain after 50, or you have morning stiffness lasting more than 30 minutes that eases as you move.

None of these? Then the rest of this page is for you.

What the pattern tells you

Pain when lying down follows the position more often than not. These are the usual patterns, and what they usually mean.

When it hurts	What it usually points to	Who checks it
Lying flat on your back, eases when you bend your knees up	A back that does not like being arched, often the small joints at the back of the spine	A physiotherapist
Lying on your stomach	The same arching, more of it	A physiotherapist
A sharp catch when you roll over or get up, settles once you are still	An irritated joint or muscle reacting to the movement, not the lying	A physiotherapist
Pain or tingling down one leg when you lie down	A nerve root in the lower back, often from a disc	A physiotherapist. A doctor orders an MRI if needed
Stiff and sore in the second half of the night and first thing, better after moving, started before 40	Possibly inflammatory back pain	A doctor soon
Pain at night whatever position you lie in, with weight loss, fever or a history of cancer	Something other than a mechanical back	A doctor soon, sooner with a fever

If the pain runs down the leg, see a slipped disc in the lower back.

Inflammatory back pain: the pattern that is different

Most back pain gets better with rest and worse with use. Inflammatory back pain does the opposite. An international rheumatology group defined it, in people with back pain for three months or more, as at least four of these five: it started before 40, it came on gradually, it improves with exercise, it does not improve with rest, and it hurts at night but improves once you get up.¹ If that is you, see your GP, who decides whether you need blood tests, a scan or a rheumatologist. Physiotherapy still plays a large part, but the diagnosis comes first.

The positions that usually help

On your side, knees slightly bent, a pillow between the knees so the top leg does not pull the pelvis round.
On your back, with a pillow or two under the knees. This takes the arch out of the lower back.
On your stomach, only if it is the only way you sleep, with a thin pillow under the hips and a thin one or none under the head.
Getting out of bed: roll onto your side, drop the legs over the edge and push up with your arms, rather than sitting straight up.
The rule: whichever position eases the pain is the right one for now. There is no single correct position for everyone.

Is it the mattress?

Sometimes. In a trial of 313 people with long-term low back pain, those given a medium-firm mattress were about twice as likely to report less pain in bed and on getting up after three months as those given a firm one.² A very soft mattress that sags, or one that is many years old, is worth a look. A harder mattress is not automatically better for the back.

Should I stay in bed?

No. Bed rest does not help back pain, and staying in bed tends to make the stiffness worse. Keep up gentle walking and normal activity within comfort, and get up and move if the pain wakes you and lying still is not easing it. Pain medication is a decision for your doctor or pharmacist.

Had an injection, or surgery?

An injection for back or leg pain is a decision between you and your doctor. Whatever is decided, the back still has to be loaded back to strength afterward, and your doctor sets when that starts. More on physiotherapy after an injection. After a microdiscectomy for a disc pressing on a nerve, see the lumbar microdiscectomy recovery program.

What our patients say

Google reviews from our clinics in Singapore.

       
 Excellent5.0565 reviews
 5.0
 Excellent565 reviews
  Write a review 
 
 
 
    
 
 
      Posted on Google  
   
   Micah 
 76 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
Amazing experience with Phoenix Rehab, was assisted by Mavis. She’s very kind and professional and did thorough check on my wrist. I feel very comfortable during the process.

I went in for thermoplastic splint, and everything went smoothly. She was able to address my needs on my left wrist sprain.

They were prompt with appointment process and inquiry. Also the clinic is very close to Tanjong Pagar MRT. I highly recommend!
  
 
     Posted on Google  
   
   Chiky Phan 
 80 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
Fist time doing ultrasound for my tennis elbow!! Let’s hope it gets better the next few weeks!! Thank Mavis Tham!!
  
 
     Posted on Google  
   
   XIN WANG 
 97 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
Great treatment from my therapist. My painful wrist felt a lot of relief after the session. I’m glad I can slowly get back to doing my usual activities without constant pain.
  
 
     Posted on Google  
   
   Abby Lee 
 113 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
Very helpful and friendly !
  
 
     Posted on Google  
   
   雪梅Cui 
 151 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
The masseur is very professional and provides excellent service ，yati is very good!
  
 
     Posted on Google  
   
   Tra Nguyen 
 242 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
I wasn’t able to close my fingers due to an injury. Nurul at Phoenix Rehab has helped me tremendously with my recovery process. I have been able to resume my daily activities and exercises after only a few sessions. Nurul has been very professional and positive throughout the entire process. Thank you so much for your help!
  
 
     Posted on Google  
   
   Juzer K 
 280 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
Huge shoutout to Yuna Zhang from Phoenix Rehab for helping in my recovery from golfer’s elbow 🙌

I walked in with persistent elbow pain that was affecting workouts and everyday tasks, and Yuna immediately made me feel confident I was in the right hands. She took the time to properly assess my condition, explain the root cause, and tailor a treatment plan to my specific needs instead of using a one-size-fits-all approach.

What I really appreciated was how personalised every session felt. The exercises she gave me were practical, easy to follow, and actually worked. Within a short time, the pain reduced significantly and my strength and mobility improved much faster than I expected.

On top of that, the pricing is very reasonable and affordable, which made committing to recovery much easier.

Professional, knowledgeable, and genuinely caring — highly recommend Yuna at Phoenix Rehab if you’re dealing with hand-related sports injuries 💪
  
 
     Posted on Google  
   
   Fazal Hanafi Chaudhry 
 364 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
I enjoy coming to Phoenix rehab as they offer a wide variety of services. I had a finger accident and was working with a very experienced hand therapist. Place is clean and comfortable.  Staff were friendly and appointment was on time
  
 
     Posted on Google  
   
   Stella Yam 
 505 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
Very good
  
 
     Posted on Google  
   
   Juliana 
 507 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +0
Have both physio n Tcm visits here, highly recommend!
  
 
 
  
 
 
   Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Why it keeps waking you

3am, again. You roll from your back to your side and the lower back catches. You lie there working out which way to turn without setting it off.

There is a pillow under your knees, another between them, and some nights you end up on the sofa because it is the only place it eases. You get up stiff, you are tired by 3pm, and the long drive or the long flight is something you plan around.

The thinking is: it is the mattress, or I need more rest. You may have changed the mattress already. You have rested more. The back is still a back that has not been moved or loaded much for months, and the mattress cannot change that.

Has anyone tested which movements set it off, bending forward or arching back, and how far each one goes before it hurts? If not, the positions you are using are a guess.

What the Assessment & Treatment does

Finding the real problem is half the battle. Treating it is the other half.

Your physiotherapist asks which positions hurt and which ease it, in your words, then tests what a label does not: how the back moves bending forward, arching back and twisting, which of those brings the pain on, whether a nerve to the leg is involved, and how the hips move. If anything points to an inflammatory pattern or something other than a mechanical back, we tell you and write to your doctor.

Most of the 45 minutes is treatment: hands-on work for the back and hips, the positions and movements that ease it, set out for your bed and your desk, and a loading plan for the back and hip muscles that starts where they are today. You leave knowing which stage you are in, what is limiting the back, what Stage 4 asks of it, and a written plan.

Tested, not dated. Every appointment is one to one with the same physiotherapist for the full 45 minutes, with no therapy assistants. Bring any scan report you have.

Questions about back pain when lying down

Why does my lower back hurt when I lie down but not when I stand?

Usually because of the position. Lying flat can arch or flatten the lower back in a way standing does not, and a stiff back that has stopped moving often complains until it moves again. If it eases when you change position or get up, it is most likely mechanical.

Is back pain at night serious?

Usually not, if it changes with position and eases when you get up. See a doctor soon if it is there whatever position you lie in, comes with weight loss, fever or a history of cancer, or if you have morning stiffness lasting more than 30 minutes that eases as you move.

What is the best sleeping position for lower back pain?

The one that eases your pain. For many people that is on the side with a pillow between the knees, or on the back with a pillow under the knees. Lying on the stomach arches the lower back and often makes it worse.

Should I get a firmer mattress for back pain?

Not necessarily. In a trial of 313 people with long-term low back pain, a medium-firm mattress did better than a firm one for pain in bed and on getting up. A mattress that sags badly is worth replacing.

Should I rest in bed if my back hurts?

No. Bed rest does not help back pain and tends to make the stiffness worse. Keep up gentle walking and normal activity within comfort.

Do I need a referral to see a physiotherapist for back pain?

No. At Phoenix you can book a physiotherapist directly. If the assessment finds anything that needs a doctor, your physiotherapist tells you and writes to your doctor.

Also on this site: the page on back pain during your period covers why it happens and what helps, and the page on lower back pain when walking covers the causes and what to check.

Where are you with this right now?

1. It is settling on its own

It eases when you change position or get up, the nights are getting easier week on week, and you are moving more, not less. Most episodes of back pain settle substantially within six weeks. Keep moving and keep using the positions that help. You do not need us for this, and we would rather say so.

2. It has stopped improving

Months on, you still plan how you turn over in bed. You get up stiff, and the long drive or the long flight is something you plan around.

The pain easing is not the same as the back being back to strength. That gap is measured, not guessed: which movements bring it on, how far each goes, and how the back and hips take load.

The Stalled Recovery Review is three appointments over three weeks with the same physiotherapist, because how a back responds to load cannot be read in one visit. The first finds what is limiting it. The next two measure how it responds. $690, nett, no GST, which is three appointments at $230.

3. You have had surgery, or you have a date

After a microdiscectomy or other back surgery, recovery has a shape, and knowing which stage you are in tells you whether you are on it. See the lumbar microdiscectomy recovery program or physiotherapy after surgery.

All of it runs on the same four stages. The Phoenix Recovery Protocol explains what each stage works on and what you have to meet to move up. No referral needed to start.

Next step

Find out which stage your back is in

Still planning how you turn over in bed? Get Assessed & Treated, and leave knowing which stage your back is in and which positions and movements it can take this week.

Get Assessed & Treated

Phoebe, our WhatsApp, replies with a clinic and two times. One 45-minute appointment, $230, nett, no GST. Bring any scan report you have. Each of our five clinics also has its own number on the clinics page.