Shoulder pain at night often relates to pressure from sleeping on the affected side or irritation or injury involving the tendons, bursae, or joint. It may become more noticeable when you lie down. Try sleeping on your back or opposite side and rest the affected arm on a pillow. Get urgent help if shoulder pain occurs with chest pressure, breathlessness, sweating, or follows a major injury.
Nighttime shoulder pain can make it difficult to fall asleep, stay asleep, or find a comfortable position. Sometimes, changing how you sleep reduces the discomfort. However, pain that repeatedly wakes you or continues despite simple adjustments may be related to an underlying shoulder problem that needs assessment. The location of the pain, recent activities, injuries, stiffness, and changes in arm movement can help a healthcare professional understand its possible cause.
Why does shoulder pain get worse at night?
Your sleeping position can place pressure on the shoulder for an extended period. Lying directly on a painful shoulder may increase discomfort, particularly when its tendons, surrounding tissues, or joint are already irritated. Even sleeping on your back may be uncomfortable if the affected arm is unsupported and the shoulder rests in a strained position.
Some shoulder conditions also cause pain during rest, not only when the arm is moving. According to Mayo Clinic, a rotator cuff injury can cause a dull shoulder ache that becomes worse at night and interferes with sleep. Nighttime pain alone, however, cannot establish which condition is responsible.
What causes shoulder pain at night?
Several problems can contribute to nighttime shoulder discomfort. The following are common possibilities, rather than a way to identify a condition based on symptoms alone.
- Sleeping on the affected shoulder: Direct pressure can aggravate already sensitive tissues and make it uncomfortable to remain in one position.
- Rotator cuff irritation or injury: The rotator cuff is a group of muscles and tendons that helps control shoulder movement and keep the joint stable. Irritation, overuse, or a tendon tear can cause aching, weakness, and pain during sleep.
- Shoulder bursitis: Bursae are small, fluid-filled sacs that help reduce friction around joints. When a bursa becomes irritated, lying on the affected shoulder may increase discomfort.
- Shoulder impingement or tendinitis: Irritation involving the shoulder tendons can cause pain during activities such as lifting the arm, reaching overhead, or lying on the affected side.
- Frozen shoulder: This condition involves stiffness and restricted movement of the shoulder. Pain may interfere with sleep as well as everyday activities.
- Arthritis or other joint problems: Changes affecting the shoulder joint can contribute to aching, tenderness, and difficulty moving the arm comfortably.
- Muscle strain or overuse: Repeated overhead movements, lifting, exercise, or an unfamiliar physical activity may leave shoulder tissues sore, including when resting at night.
- Pain referred from another area: Problems involving the neck or, in some cases, other parts of the body can be felt in the shoulder even when the shoulder joint itself is not the source.
The MedlinePlus shoulder pain guide describes several possible causes, including bursitis, rotator cuff tears, frozen shoulder, arthritis, and pain originating outside the shoulder. A healthcare professional considers the full pattern of symptoms and examination findings rather than relying on nighttime pain alone.
What is the best sleeping position for shoulder pain?
The most useful position is one that avoids direct pressure on the painful shoulder and keeps your arm comfortably supported. There is no single position that works for everyone, so make gradual adjustments and choose the arrangement that reduces discomfort without forcing your shoulder into an awkward position.
1. Sleep on your back with your arm supported
Sleeping on your back can help you avoid putting your body weight directly on the affected shoulder. Place a pillow or folded blanket beneath the affected arm so that the elbow and forearm are comfortably supported. Allow the arm to rest slightly away from your body rather than letting it drop backward or hang unsupported. Adjust the pillow until the shoulder feels relaxed.
2. Sleep on your unaffected side
If you prefer sleeping on your side, lie on the side that does not hurt. Place a pillow in front of your chest and rest the affected arm on it, keeping the arm supported in a comfortable, natural position. Avoid reaching far forward, stretching the arm above your head, or allowing it to fall across your body in a way that increases pain.
3. Avoid lying directly on the painful shoulder
Sleeping on the affected side can place direct pressure on sensitive shoulder tissues. If you tend to roll onto that side during the night, try placing a body pillow behind your back or hugging a pillow in front of you. These pillows may help you remain in a more comfortable position without needing to hold your arm in place deliberately.
4. Try changing your usual sleeping posture
Stomach sleeping may be uncomfortable for a painful shoulder, particularly if you keep one arm raised or tucked underneath your pillow. Experiment with sleeping on your back or the opposite side instead. The Cleveland Clinic guide to sleeping positions for pain also describes using pillows to support the affected arm and reduce strain. Do not force a position that makes your symptoms worse.
How can you reduce shoulder pain before bed?
Small changes to your evening routine may make it easier to settle into a comfortable sleeping position. The aim is to avoid aggravating the shoulder while allowing it to move normally within your comfort limits.
- Reduce aggravating activities: Avoid heavy lifting, repeated overhead reaching, or strenuous exercises that increase your pain, particularly close to bedtime.
- Apply a cold pack when appropriate: If the shoulder is sore after recent activity or appears swollen, a cold pack wrapped in a thin towel may help. Apply it for about 20 minutes at a time and never place ice directly against your skin.
- Consider gentle warmth for stiffness: A warm shower may help some people feel more comfortable when stiffness is present without swelling. Avoid applying heat to an area that is swollen or excessively warm.
- Keep the shoulder moving comfortably: Gentle, pain-tolerable movement may help prevent unnecessary stiffness. Avoid forceful stretches or exercises that increase the pain, and follow any restrictions given after an injury or operation.
- Set up your pillows before lying down: Arrange the pillows so you can support the affected arm without repeatedly reaching, twisting, or pushing yourself into an uncomfortable position.
MedlinePlus guidance on rotator cuff self-care recommends avoiding additional strain, supporting the arm during sleep, and using a cloth-wrapped ice pack for a limited period when appropriate. If you have had shoulder surgery or a significant injury, follow your clinician's specific instructions instead of starting new exercises or changing prescribed support.
When should you seek medical care for shoulder pain at night?
Arrange a medical appointment if shoulder pain repeatedly interrupts your sleep, continues for around two weeks without improvement, becomes worse, or makes it difficult to use your arm during everyday activities. An earlier assessment may be appropriate when the pain is unusual or concerning, or when you have recently injured your shoulder.
Seek urgent medical attention if you develop sudden, intense shoulder pain, cannot move your arm, notice a change in the shoulder's shape, or have substantial swelling following an injury. Persistent numbness or tingling, a shoulder that feels unusually hot or cold, or shoulder pain accompanied by fever or feeling unwell also needs prompt assessment. The NHS shoulder pain guidance outlines symptoms that warrant urgent review.
Call your local emergency number immediately if shoulder pain occurs with chest pressure or pain, shortness of breath, sweating, dizziness, or pain spreading to the arm, jaw, neck, or back. These symptoms can indicate a heart attack or another medical emergency, even when the discomfort is felt mainly in the shoulder.
What can a healthcare professional do to find the cause?
A healthcare professional may ask when the pain started, whether it followed an injury or repetitive activity, which positions make it worse, and whether you have stiffness, weakness, or neck symptoms. They may examine shoulder movement and strength and assess nearby areas when needed. Depending on the findings, an X-ray or another imaging test may be considered.
Treatment depends on the cause and may involve modifying activities, physiotherapy, exercises tailored to the condition, or medication when appropriate. Some injuries require more specialized care. An accurate assessment is especially useful when pain persists at night because the best treatment depends on the underlying problem, not simply on when the pain occurs.