Shoulder Pain At Night: Why It Happens and What Helps
You finally get comfortable in bed, only to wake up a few hours later with an aching shoulder. You roll onto your other side, adjust your pillow, and try to fall back asleep. But the pain keeps coming back.
Shoulder pain at night is a common complaint, and it can be especially frustrating when it interferes with your sleep. Sometimes the discomfort only occurs when lying on one side. Other times, the shoulder aches regardless of your sleeping position.
The good news is that nighttime shoulder pain does not automatically mean something is torn or seriously damaged. Several common shoulder conditions can cause these symptoms, and many respond well to conservative treatment, including physical therapy.
Why Does Shoulder Pain Get Worse at Night?
There are several reasons your shoulder might bother you more when you're trying to sleep.
1. Pressure on sensitive tissues
When you lie directly on a painful shoulder, your body weight places additional pressure on the surrounding muscles, tendons, and other structures. If those tissues are already sensitive, this position may increase your discomfort.
2. Your shoulder stays in one position for hours
During the day, you naturally change positions and move your arms frequently. At night, your shoulder may remain in a position that aggravates symptoms for an extended period.
3. Certain sleeping positions can aggravate symptoms
Sleeping with your arm overhead, tucked underneath your body, or unsupported in front of you may increase discomfort depending on your shoulder condition. Importantly, nighttime pain alone cannot tell us exactly which structure is responsible. Understanding your other symptoms can help narrow down the possibilities.
4 Common Causes of Shoulder Pain While Sleeping
1. Rotator Cuff Tendinopathy
Your rotator cuff consists of four muscles and their tendons that help stabilize and move your shoulder. Rotator cuff tendinopathy is a common source of shoulder pain, particularly with reaching, lifting, and overhead activities.
You might notice:
Pain when lying on the affected shoulder
Discomfort when reaching overhead or behind your back
Pain along the outside of your upper arm
Difficulty lifting or carrying certain objects
Although symptoms may feel worse at night, the underlying issue often involves how much activity or loading the shoulder can currently tolerate. Physical therapy typically focuses on gradually improving shoulder strength, movement, and tolerance to daily activities.
2. Rotator Cuff Tears
A rotator cuff tear can also cause nighttime shoulder pain. Tears may develop gradually or occur following an injury, such as a fall. Some people experience pain and weakness when lifting their arm, while others have relatively few symptoms.
It's important to understand that a rotator cuff tear does not always require surgery. Treatment depends on factors such as the type of tear, functional limitations, symptoms, and individual goals. An examination can help determine whether additional medical evaluation or imaging is appropriate.
3. Frozen Shoulder
Frozen shoulder, also called adhesive capsulitis, involves progressive shoulder pain and restricted movement. One distinguishing feature is a significant loss of shoulder mobility, including difficulty moving the arm even when someone else attempts to move it for you.
Common complaints include:
Increasing shoulder stiffness
Difficulty reaching behind your back
Trouble getting dressed or putting on a jacket
Shoulder pain that disrupts sleep
Unlike many other shoulder conditions, frozen shoulder can take a considerable amount of time to resolve. Treatment should be adjusted to the stage and irritability of the condition.
4. Pain Referred From Your Neck
Not all shoulder pain originates in the shoulder itself.
Certain conditions involving the cervical spine can produce pain around the shoulder blade, upper arm, or shoulder region. If your symptoms change significantly with neck movement, or you experience tingling, numbness, or pain traveling farther down the arm, your neck may be contributing. A thorough physical therapy evaluation can help distinguish between shoulder-related pain and symptoms originating elsewhere.
How Should You Sleep With Shoulder Pain?
While there isn't one perfect sleeping position for everyone, a few simple adjustments may help reduce discomfort.
Sleep on Your Unaffected Side
If only one shoulder hurts, try sleeping on the opposite side. Place a pillow in front of your body and rest your painful arm on it. This provides support and may reduce the discomfort associated with letting your arm hang across your chest.
Try Sleeping on Your Back
Sleeping on your back may be more comfortable because it avoids placing your body weight directly on either shoulder. Consider placing a small pillow beneath your painful arm to support it in a relaxed position.
Avoid Positions That Consistently Increase Pain
If sleeping with your arm overhead or underneath your pillow makes your shoulder hurt, try adjusting that position. You don't need to maintain one rigid posture throughout the night. The goal is simply to find positions that allow your shoulder to remain comfortable.
Should You Stretch a Painful Shoulder Before Bed?
It depends on what's causing your symptoms.
Gentle movement may help some people feel more comfortable, but aggressive stretching isn't always beneficial. For example, someone with an irritable rotator cuff condition may find that forcing their arm into painful overhead positions increases symptoms. Similarly, aggressive stretching during a highly painful stage of frozen shoulder may be poorly tolerated. Rather than assuming your shoulder needs more stretching, it's important to identify whether your primary limitation involves mobility, strength, pain sensitivity, or a combination of factors.
Can Physical Therapy Help With Shoulder Pain at Night?
Yes. Physical therapy can be an effective treatment for many common causes of shoulder pain, particularly rotator cuff-related conditions. Treatment begins with understanding your symptoms and identifying the movements and activities that contribute to your discomfort.
Depending on your presentation, physical therapy may include:
Progressive strengthening: Improving the ability of your shoulder muscles and tendons to tolerate activity.
Mobility exercises: Addressing meaningful limitations in shoulder movement.
Activity modification: Temporarily adjusting aggravating activities without unnecessarily avoiding movement.
Manual therapy: Providing short-term symptom relief when appropriate.
Education: Helping you understand your symptoms and manage them more confidently.
Research supports exercise-based rehabilitation as a primary treatment for rotator cuff tendinopathy. The most effective approach is individualized rather than relying on one exercise or treatment technique for everyone.
When Should You Get Your Shoulder Checked?
Occasional discomfort after an unusually demanding activity may settle with time and appropriate activity adjustments.
However, consider scheduling an evaluation if:
Shoulder pain repeatedly interrupts your sleep
Symptoms persist or progressively worsen
You're having difficulty reaching, lifting, or getting dressed
You notice increasing stiffness or weakness
You've modified your sleeping position but continue to experience significant discomfort
Seek prompt medical attention for sudden severe pain after an injury, significant weakness following trauma, a visibly deformed shoulder, fever with a hot or swollen joint, or shoulder pain accompanied by chest pain or difficulty breathing.
Don't Let Shoulder Pain Keep Interrupting Your Sleep
If you're constantly switching sleeping positions, waking up with shoulder pain, or avoiding activities because of discomfort, it may be time to have your shoulder evaluated.
At Kinetik Performance and Rehab in Mission Viejo, California, we help patients understand what's contributing to their symptoms and develop individualized treatment plans focused on restoring movement, improving strength, and returning to the activities they enjoy.
Schedule a physical therapy evaluation with Kinetik Performance and Rehab to take the next step toward more comfortable movement and better sleep.
References
Desmeules F, et al. (2025). Rotator Cuff Tendinopathy Diagnosis, Nonsurgical Medical Care, and Rehabilitation: A Clinical Practice Guideline. Journal of Orthopaedic & Sports Physical Therapy. https://pubmed.ncbi.nlm.nih.gov/40165544/
American Academy of Orthopaedic Surgeons. Rotator Cuff Tears. https://orthoinfo.aaos.org/en/diseases--conditions/rotator-cuff-tears/
National Health Service. Frozen Shoulder. https://www.nhs.uk/conditions/frozen-shoulder/
National Health Service. Shoulder Pain. https://www.nhs.uk/symptoms/shoulder-pain/
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