A strained shoulder happens when muscle fibers or tendons in the shoulder overstretch or partially tear. The good news: most shoulder strains heal well with a combination of rest, ice, gentle movement, and patience. Mild strains typically resolve in a few weeks, while more severe tears can take a couple of months.
What a Shoulder Strain Actually Is
Your shoulder relies on muscles, tendons, and ligaments all working together to produce its wide range of motion. Tendons anchor muscle to bone, and ligaments connect bone to bone. A strain specifically involves the muscles or tendons, not the ligaments (that would be a sprain). When those fibers get overstretched or torn, the result is pain, swelling, and limited movement.
The most commonly strained structures in the shoulder are the rotator cuff muscles and the tendons that attach them. Strains can range from mild (a few overstretched fibers) to severe (a complete tear). The severity determines how long recovery takes and whether you’ll need professional help.
First 48 to 72 Hours: Rest, Ice, and Protection
The initial days after a strain are about controlling swelling and preventing further damage. Start by resting the shoulder. This doesn’t mean total immobilization, but avoid lifting, reaching overhead, or any movement that causes sharp pain.
Apply ice wrapped in a cloth or towel (never directly on skin) for 10 to 20 minutes at a time, every one to two hours. This helps limit swelling and provides pain relief. If you can comfortably wrap the shoulder with a light compression bandage, that also reduces swelling, but don’t wrap so tightly that you feel numbness or tingling. When you’re sitting or lying down, try to keep the injured shoulder elevated, ideally above heart level if possible.
Over-the-counter anti-inflammatory pain relievers can help during this phase. Ibuprofen (one to two 200 mg tablets every four to six hours, up to 1,200 mg per day) or naproxen sodium (one to two 220 mg tablets every 8 to 12 hours, up to 660 mg per day) both reduce pain and inflammation.
Gentle Movement After the First Few Days
Once the initial swelling starts to settle, usually after two to three days, you want to begin moving the shoulder gently. Staying completely still for too long can lead to stiffness and actually slow healing. The key is controlled, pain-free motion.
Start with pendulum exercises: lean forward slightly, let your injured arm hang, and gently swing it in small circles. This moves the joint without loading the muscles. You can also try passive range-of-motion work, using your good arm to guide the injured one through slow, easy movements.
If any movement causes sharp or worsening pain, stop. A dull ache during gentle exercise is normal and expected. Sharp pain means you’re pushing too far.
Sleeping With a Strained Shoulder
Nighttime is often the worst part of a shoulder strain. The wrong sleeping position can compress the joint and spike your pain levels.
If you sleep on your back, place a folded blanket or low pillow under your injured arm to support it and keep the shoulder aligned with your body. This prevents the shoulder from dipping backward into the mattress. If you’re a side sleeper, sleep with the injured shoulder facing up and use a pillow to keep that arm in a straight, neutral position rather than letting it fall across your chest. Stomach sleeping is the worst option for shoulder injuries. Putting your arm under your pillow, as stomach sleepers tend to do, compresses the rotator cuff and sets the stage for a longer recovery.
Your pillow should be thick enough to support your head without letting it droop, which creates neck strain that can radiate into the shoulder. Placing a pillow between your knees if you’re on your side also helps keep your torso from twisting.
When the Strain Needs Professional Attention
Most mild shoulder strains don’t need a medical visit. But certain signs suggest something more serious is going on. Seek prompt medical care if you cannot move your arm at all, if the shoulder has visibly changed shape or is badly swollen, or if you have persistent pins and needles, numbness, or weakness in the arm.
Even without those red flags, see a healthcare provider if your pain is getting worse rather than better, or if it hasn’t improved after two weeks of home care. A strain that isn’t healing on its expected timeline may be a more severe tear, or there may be an additional injury that needs to be identified.
Physical Therapy and Professional Treatment
For strains that don’t fully resolve with home care, physical therapy is the most effective treatment. The research is clear that therapeutic exercise is the cornerstone of shoulder rehabilitation. Hands-on techniques like joint mobilization and massage can provide additional benefit, but they work best when combined with a structured exercise program rather than used on their own. Similarly, treatments like electrical stimulation or ultrasound have limited evidence as standalone therapies for shoulder pain.
A physical therapist will typically start with range-of-motion exercises, then progress to strengthening work for the rotator cuff and the muscles around the shoulder blade. They may also include exercises targeting the upper back and spine, which research suggests produces better outcomes for rotator cuff-related shoulder pain. Expect sessions to focus heavily on exercises you’ll repeat at home between visits. Consistency with those home exercises matters more than the in-office treatments.
Recovery Timeline by Severity
Mild strains, where the muscle or tendon is overstretched but not significantly torn, generally heal within two to three weeks. You’ll likely notice steady improvement each day, with pain decreasing and movement returning gradually.
Moderate strains involving a partial tear take longer, often four to six weeks before you’re back to normal activities. You may regain basic function fairly quickly but still feel pain with overhead movements or heavy lifting for several weeks beyond that.
Severe strains, where the muscle or tendon is completely or nearly completely torn, can take a few months to heal. Some complete tears require surgical repair, though many are managed with extended physical therapy. Your provider will determine the grade of your strain based on your symptoms, physical exam, and sometimes imaging.
Returning to Activity Safely
The biggest mistake people make with shoulder strains is returning to full activity too soon. A shoulder that feels “good enough” is still vulnerable to re-injury if the tissue hasn’t fully healed and the surrounding muscles haven’t regained their strength.
Before returning to sports, lifting, or physical work, you should have full, pain-free range of motion and strength that’s close to equal on both sides. A gradual return works best. Start at reduced intensity or load and increase over one to two weeks. If pain returns, scale back and give it more time. Rushing this stage is how a simple strain becomes a recurring problem.