Overview
A shoulder sprain is an injury to the shoulder's ligaments and other supporting soft tissues, usually from overstretching or a sudden force. The sprain can involve structures around the shoulder joint and the connective tissue that helps keep the joint stable. This injury commonly causes pain and stiffness because inflamed or irritated tissue doesn't tolerate normal movement well. Some people may also feel weakness or a sense that the shoulder is "not quite right," especially when lifting or reaching.
Symptoms
Shoulder sprain symptoms typically include pain around the shoulder joint, tenderness to touch, and limited range of motion. Discomfort is often worse with reaching overhead, lifting, pushing, or sleeping on the affected side. Stiffness and muscle guarding are common in the days after injury, and mild swelling or bruising may occur depending on the force of the injury. Some patients notice weakness because pain limits how much they can use the arm, rather than because of a true loss of muscle power.
Causes
Shoulder sprains most often develop after a fall, direct blow, sports contact, or a sudden twisting or pulling injury. The typical mechanism is overstretching of the ligaments and surrounding tissues, which can lead to inflammation and micro-injury. Repetitive strain from heavy lifting or frequent overhead activity can also contribute in some cases, especially when tissues become overloaded and irritated.
Risk Factors
People are more likely to get a shoulder sprain if they participate in contact sports, lift heavy loads, or work with frequent overhead movements. A history of prior shoulder injury, poor shoulder conditioning, or limited flexibility can increase the chance of overstretching. Not warming up, using poor technique, or returning to activity before symptoms fully resolve also raises risk.
Prevention
To help prevent shoulder sprains, warm up before activity and avoid sudden increases in intensity or load. Building strength in the rotator cuff and scapular stabilizers, along with mobility and posture-focused exercises, can improve shoulder tolerance. Using proper lifting and throwing mechanics and allowing adequate recovery time after minor injuries can reduce recurrence.
How the Diagnosis Is Evaluated
Clinicians usually start with a detailed history of how the injury happened and what movements trigger pain. A physical exam focuses on range of motion, tenderness, joint stability, and strength testing, along with checking sensation and circulation in the arm. Imaging is not always needed, but an X-ray may be used to rule out fracture or dislocation, and MRI is sometimes ordered if symptoms are severe, persistent, or suggest a more significant tear or internal injury.
Nonsurgical Treatment Options
Initial treatment typically includes relative rest and activity modification to avoid movements that sharply increase pain while keeping the shoulder gently mobile. Ice is often used early to reduce pain and swelling, and heat can help after the acute phase to ease stiffness. Over-the-counter anti-inflammatory medicines or acetaminophen may be used if appropriate for your health conditions. Physical therapy is a mainstay and usually includes guided mobility, posture work, and gradual strengthening to restore control and reduce reinjury risk. A brief sling may be considered for short-term comfort in select cases, but prolonged immobilization can worsen stiffness. If symptoms do not improve, some patients may benefit from a corticosteroid injection for persistent inflammation, and platelet-rich plasma (PRP) injections may be considered in refractory or longer-lasting cases under appropriate clinical guidance.
When to Seek Medical Attention
Seek prompt medical attention if you cannot move the shoulder, have significant weakness, a visible deformity, or major swelling or bruising after an injury. Get urgent care if you develop numbness or tingling, symptoms that are rapidly worsening, or any concern for nerve injury. You should also be evaluated if you have fever, redness, or feel ill, or if pain and function are not improving within about 1 to 2 weeks despite conservative care.
Frequently Asked Questions
Many mild shoulder sprains improve in a few weeks with rest and rehabilitation, while more severe injuries can take longer depending on tissue damage and adherence to therapy.
Not always; imaging is usually reserved for severe injuries, ongoing symptoms, or when exam findings suggest a more serious tear or internal problem.
Next Steps
Start with relative rest, gentle pain-limited motion, and conservative pain control while you monitor improvement over the next several days. If your shoulder is not steadily improving, feels unstable, or you have trouble lifting the arm, schedule a clinical evaluation to confirm the diagnosis and guide rehab. If you have numbness, major weakness, deformity, or worsening symptoms, seek urgent care right away.