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Why Shoulder Pain Is Worse When Sleeping on Your Side—And How to Fix It

von Von Buenaobra Oktober 10, 2024

Why Shoulder Pain Is Worse When Sleeping on Your Side—And How to Fix It

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Shoulder pain can significantly affect your sleep quality, especially if you sleep on your side. While side sleeping is widely considered one of the healthiest sleep positions for your spine, it can place a lot of pressure on your shoulders, leading to pain, discomfort, and even long-term issues. If you've ever woken up with soreness in your shoulder or had trouble falling asleep because of shoulder discomfort, you're not alone.


This article explores why shoulder pain tends to worsen when sleeping on your side, the science behind it, and most importantly, how you can fix it with proper support and adjustments.


Why Does Shoulder Pain Happen When Sleeping on Your Side?


The cause of shoulder pain when sleeping on your side primarily boils down to pressure and poor alignment. Here’s a breakdown of the most common reasons:

1. Excessive Pressure on the Shoulder Joint
When you sleep on your side, a large portion of your body weight is concentrated on one shoulder. This added pressure can compress the muscles, tendons, and nerves around the shoulder joint. Over time, the prolonged pressure can cause inflammation and lead to conditions such as rotator cuff injuries or bursitis.
According to a study in the Journal of Shoulder and Elbow Surgery, pressure-induced shoulder pain is a common problem among side sleepers, particularly those who don’t use adequate support to reduce the load on their shoulder.

2. Misalignment of the Spine and Shoulder
When your shoulder bears the brunt of your body weight while you sleep, it can shift out of its natural alignment. Poor posture and sleeping on an unsupportive surface can cause the shoulder to rotate inward, placing stress on the tendons and muscles. This misalignment can lead to pain, stiffness, and even long-term damage.


Without proper support, your neck may also bend awkwardly, causing misalignment in your entire upper body. This not only affects your shoulders but can also lead to neck pain and upper back discomfort.

3. Inadequate Pillow Support
Using a pillow that is too flat, too firm, or not the right size for your body can exacerbate shoulder pain. Side sleepers need a pillow that fills the space between the neck and the mattress to maintain proper spinal alignment. Without this support, the shoulder has to carry more weight, increasing the likelihood of pain.


A study in the Journal of Physical Therapy Science emphasized the importance of the right pillow loft (height) to support both the neck and shoulders while maintaining natural spinal alignment. Side sleepers, in particular, need a pillow that can distribute the pressure evenly and prevent strain on the shoulder joint.
Learn more about proper pillow support for side sleepers.

 

How to Fix Shoulder Pain When Sleeping on Your Side

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Now that we understand the root causes of shoulder pain for side sleepers, let's explore the solutions. By making adjustments to your sleeping position and using the right tools, you can significantly reduce or even eliminate shoulder discomfort.


1. Use a Pillow Designed for Side Sleepers
One of the easiest and most effective ways to address shoulder pain is to invest in a pillow specifically designed for side sleepers. These pillows often have features such as a built-in arm hole or contoured shape to provide better support for the shoulder, neck, and head.


The Wife Pillow, for example, has a unique design that includes an arm hole, which allows side sleepers to rest their arm naturally without putting pressure on the shoulder. This simple feature can prevent the shoulder from being compressed and relieve the pressure that causes pain. Explore the Wife Pillow and its shoulder-relieving design here.

2. Adjust Your Sleeping Position
Though side sleeping is generally considered a good position for spinal alignment, adjusting how you position your body can help relieve shoulder pain.
Avoid sleeping directly on the shoulder: Shift your body slightly forward or backward to avoid pressing your entire weight onto one shoulder.
Place a pillow between your arms: This can help to balance your upper body and prevent your shoulder from collapsing inward. A body pillow or an arm pillow works great for this.
Support your knees: Placing a pillow between your knees can help keep your hips aligned with your spine, reducing overall strain on your shoulder and back.

3. Ensure Proper Mattress Support
Your mattress plays a crucial role in how your body aligns during sleep. A mattress that is too firm can increase the pressure on your shoulder, while a mattress that is too soft can cause your body to sink, misaligning your spine and shoulder.
For side sleepers, a medium-firm mattress is generally the best option. It provides enough give to accommodate your shoulders and hips while maintaining enough firmness to support proper spinal alignment. A mattress that is specifically designed for side sleepers can also help distribute your weight more evenly, reducing pressure on the shoulders.

4. Stretch and Strengthen Your Shoulder Muscles
Sometimes, shoulder pain is caused by muscle tension or weakness. Incorporating stretches and exercises that target the shoulders can help relieve pain and prevent future discomfort.

  • Shoulder Stretches for Pain Relief: Cross-body shoulder stretch: Bring one arm across your chest and hold it in place with your other arm. This stretch helps relieve tension in the shoulder and increases flexibility.
  • Doorway chest stretch: Stand in a doorway, place your forearms on the doorframe, and gently lean forward. This stretch opens up your chest and shoulders, relieving tightness.

Strengthening exercises such as shoulder presses and rotator cuff exercises can help build muscle around the shoulder joint, reducing the risk of injury.

5. Use a Body Pillow or Supportive Cushion
If you're prone to shoulder pain, a body pillow can offer extra support. By hugging a body pillow, you can keep your shoulder in a more natural position, which reduces the likelihood of waking up in pain. Body pillows help distribute your weight more evenly across your torso and reduce pressure points.


For example, the Husband Pillow offers support for both back and side sleepers, making it easier to relax in a neutral position while watching TV, reading, or even sleeping. Its adjustable memory foam contours to your body’s shape, giving your shoulder and back the relief they need. Discover more about the benefits of the Husband Pillow here.



Long-Term Solutions to Prevent Shoulder Pain


Addressing shoulder pain isn't just about fixing your sleep position; it’s about creating a holistic approach to support your body and prevent future pain. Here are some long-term solutions to prevent shoulder pain from recurring:

  1. Maintain a Regular Stretching Routine Daily shoulder stretches help keep the muscles and tendons flexible, which can prevent tightness and stiffness from developing. By incorporating just 5–10 minutes of stretching into your morning or evening routine, you can greatly reduce the risk of chronic shoulder pain.
  2. Strengthen Your Shoulder Muscles Building shoulder strength can help support the joint and reduce the likelihood of injury or strain. Focus on exercises that target the rotator cuff, as these muscles are responsible for stabilizing the shoulder.
  3. Invest in Ergonomic Support Consider not only your pillow and mattress but also your daytime posture. Poor posture during the day, especially when sitting at a desk for long hours, can contribute to shoulder pain at night. Make sure you use ergonomic chairs, and take frequent breaks to stretch and adjust your posture throughout the day.

 


Final Thoughts: Fixing Shoulder Pain for Better Sleep

 

Shoulder pain can make it difficult to enjoy restful sleep, but with the right adjustments, you can minimize discomfort and wake up feeling refreshed. Side sleepers, in particular, need to focus on maintaining proper alignment and reducing pressure on the shoulders.


By using a pillow designed for side sleepers, adjusting your sleep position, and supporting your body with the right mattress and stretches, you can significantly reduce shoulder pain and improve your sleep quality.


Ready to relieve shoulder pain and enjoy better sleep? Check out our range of pillows designed specifically for side sleepers to find the one that best fits your needs.

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Von Buenaobra
Von Buenaobra