Why does my low back hurt when I wake up?

Why Does My Lower Back Hurt When I Wake Up? 

Waking up with a stiff, aching, or painful lower back is incredibly common. In fact, it’s one of the most frequent questions people ask when they first come to see me at Unwind. Many people tell me, “My back feels fine when I go to bed, but when I wake up in the morning it’s sore and stiff.” If that sounds familiar, you’re certainly not alone. 

The good news is that morning lower back pain is often linked to factors that can be identified and improved. While every person is different, there are usually a combination of causes involved. Throughout our lives we accumulate old injuries, repetitive strains, poor habits, and postural stresses that can all contribute to how our body feels when we wake up. When discussing morning back pain with patients, I usually focus on three key areas: 

1. Your mattress – its age, condition, and firmness. 
2. Your pillow – its height, support, and material. 
3. Your sleeping position. 

Whether you’re currently receiving treatment or simply looking for ways to help yourself, making positive changes in these areas can support your spine, reduce strain on old injuries, and improve the quality of your sleep. 
​Let’s look at each one in more detail...​

Is your mattress contributing to your back pain?

Your mattress plays a significant role in how well your spine is supported overnight. If it's too soft, your hips and shoulders may sink excessively, placing extra stress on your lower back. On the other hand, even the ideal mattress won't provide good support if it's paired with the wrong pillow. Together, your mattress and pillow should keep your spine in a comfortable, neutral position throughout the night.
The age and condition of your mattress are also important. A simple way to assess it is to run your hands firmly over the area where you sleep, feeling for dips, sagging, or compressed sections. Even if a mattress still looks perfectly fine, its supportive qualities gradually decline over time. If yours is more than seven to ten years old and you regularly wake with stiffness or discomfort, it may be worth considering whether it's still providing the support you need.
Sleeping away from home can also provide useful clues. In my experience, softer-than-usual hotel mattresses and pillows can sometimes trigger back pain, particularly in people who already have a sensitive back. However, I've also had many patients tell me they woke feeling noticeably better while staying in a hotel, guest room, or holiday accommodation. If that happens, it may suggest your mattress at home is contributing to your symptoms.
Of course, it's important not to jump to conclusions. When you're on holiday you're often more relaxed, sleeping longer, and taking a break from the physical and mental demands of work, all of which can influence how your back feels. Nevertheless, noticing how your symptoms change when you sleep in a different bed can be a valuable clue when trying to identify the cause of persistent morning back pain.

Why pillow height matters more than you might think.

When people think about pillows, they usually associate them with neck pain or headaches. However, the right pillow plays an important role in the alignment of your entire spine.
If your pillow is too high or too low, it can tilt or twist your neck during sleep. This altered position forces the neck and upper back to compensate, creating tension that can eventually affect the lower back as well. Because we spend many hours sleeping each night, even small alignment issues can have a cumulative effect.
For side sleepers, the pillow should fill the space between the shoulder and the head, keeping the neck in a neutral position. Back sleepers generally benefit from a lower pillow—in fact, I often recommend using just a couple of folded towels rather than a traditional pillow. This height may need to be adjusted if there are restrictions in the normal movement of the neck or mid-back, but the key principle is to avoid pushing the head too far forwards.
Over the years, I've made customised pillow packs consisting of multiple layers of firm and soft foam. This allows people to adjust the height and firmness at home until they find the combination that best suits their body and their mattress.
If you want to experiment before investing in a new pillow, a simple temporary solution is to build up the height using folded towels to create a firm base, then place a thin, soft pillow on top for comfort. This approach makes it easy to fine-tune the support until your head and neck are comfortably aligned.

Could your sleeping position be the culprit?

The position you sleep in can have a surprisingly big impact on how your back feels when you wake up.
Sleeping on your stomach is generally the most challenging position for your spine. It tends to increase the arch in the lower back, flatten the natural curve of the upper back, and requires your neck to stay turned to one side for hours at a time. Over time, this combination can place unnecessary strain on your spine and surrounding muscles.
If you're trying to move away from sleeping on your stomach, the first step is often to optimise your pillow, as discussed above. A pillow that properly supports your head and neck can make side sleeping feel much more comfortable and sustainable.
When sleeping on your side, placing a thin pillow between your knees can also help. It keeps your pelvis more level, reduces twisting through the lower back, and can lessen the stress on your hips, pelvis, and knees throughout the night.

Movement is key!

While your bed setup is important, it's only part of the picture. After several hours of lying still, it's perfectly normal for your joints to become less mobile and your muscles to feel stiff. This is especially true if you've had previous back injuries, spend long periods sitting during the day, or simply aren't moving as much as your body would like.

A gentle morning movement routine can make a surprisingly big difference. Personally, I've been following a 30-minute yoga programme on YouTube, and I've noticed how much better I feel afterwards. That said, it's no substitute for attending a class with a qualified instructor who can guide your technique and help reduce the risk of injury.
Yoga isn't the only option. A short walk after breakfast, Pilates, Qigong, swimming, or any gentle form of movement can all help. The goal isn't to force anything or stretch aggressively. Instead, the aim is to gradually restore movement, improve circulation, and ease stiffness through the joints and muscles, helping your body transition comfortably into the day.

When Should You Seek Professional Advice?

Occasional morning stiffness is common and often improves with simple changes to your sleep environment and daily habits. However, if your lower back pain is becoming more frequent, lasting longer, affecting your sleep, or preventing you from enjoying normal activities, it may be worth seeking professional assessment. Sometimes persistent morning pain can be linked to joint restrictions, muscle imbalances, previous injuries, or underlying mechanical issues that benefit from targeted treatment and advice. 

The Bottom Line.
If you’re waking up with lower back pain, don’t assume it’s something you simply have to live with. Small adjustments in the areas mentioned above can often produce noticeable improvements. Combine this with regular movement during the day and a gentle morning mobility routine, and many people find their symptoms begin to settle. If the problem persists despite making these changes, a thorough assessment can help identify the underlying cause and provide a clear plan to get you moving comfortably again. 

At Unwind, I regularly help people understand why they’re waking up with back pain and, more importantly, what they can do about it. If morning stiffness or lower back pain is becoming a regular part of your day, I'll be happy to help.