The most reliable signs that you’ve torn something in your shoulder are pain when lifting your arm, noticeable weakness, and a loss of range of motion that doesn’t improve after a few days. Shoulder tears can involve the rotator cuff tendons, the labrum (cartilage lining the socket), or the biceps tendon, and each produces slightly different symptoms. Sorting out what you’re feeling can help you decide how urgently to get it checked out.
The Key Signs of a Shoulder Tear
Shoulder tears share a cluster of symptoms that distinguish them from simple strains or bruises. Pain that spikes when you lift your arm, especially above shoulder height or away from your body, is one of the most common indicators. You may also notice weakness you can’t explain, like struggling to hold a coffee cup at arm’s length or finding it difficult to reach behind your back to tuck in a shirt.
Mechanical symptoms point even more strongly toward a structural tear. Popping, clicking, or a grinding sensation during movement suggests that something inside the joint has been disrupted. A feeling that your shoulder could slip out of place is particularly associated with labral tears, where the cartilage ring that helps keep the ball of the joint centered in its socket has been damaged.
One important detail: pain at night, particularly when lying on the affected shoulder, is extremely common with rotator cuff tears and often what drives people to finally seek help.
Rotator Cuff Tears vs. Labral Tears
Your rotator cuff is a group of four tendons and muscles that attach your upper arm bone to your shoulder blade. Tears here typically cause pain when lifting, loss of strength, and cracking or snapping sounds during movement. The specific movement that hurts can hint at which tendon is involved. Difficulty raising your arm overhead often points to the supraspinatus tendon (the most commonly torn). Trouble rotating your arm outward, like when brushing your hair or washing your face, suggests the infraspinatus or teres minor tendons. Weakness when rotating your arm inward, such as reaching behind your back, may involve the subscapularis.
Labral tears feel different. The labrum is a ring of cartilage surrounding the shoulder socket, and when it tears, the hallmark symptoms are a popping sensation, a deep ache inside the joint (rather than on top of the shoulder), and a feeling of instability, as though the shoulder might dislocate. A specific type called a SLAP tear (affecting the top of the labrum where the biceps tendon attaches) often produces a catching or grinding feeling during overhead motions like throwing.
Partial Tears vs. Full-Thickness Tears
Not all tears are the same size, and the severity affects both symptoms and treatment. A partial tear goes only part of the way through the tendon. It can be as shallow as 1 millimeter, roughly 10 percent of the tendon’s depth, or it can extend through more than half the tendon. A full-thickness tear goes all the way through.
Partial tears generally cause pain, most noticeably when lifting objects above shoulder level or far from your body. You may still have reasonable strength and range of motion. Full-thickness tears are more likely to cause significant weakness. In severe cases involving multiple tendons, people lose the ability to raise their arm above 90 degrees, a condition sometimes called pseudoparalysis. This doesn’t mean the nerve is damaged; the muscles simply can’t generate enough force without intact tendons to pull on.
Simple Tests You Can Try at Home
No home test replaces imaging, but a few checks can give you useful information before your appointment. Try raising your arm straight out to the side with your thumb pointing down (as if emptying a can). Pain or weakness in this position is the basis of Jobe’s test, one of the most sensitive clinical maneuvers for supraspinatus tears. In research, this test correctly identifies about 88% of supraspinatus tears.
Another simple check: raise your arm out to the side to shoulder height, then slowly lower it. If your arm drops suddenly or you can’t control the descent, that mimics the “drop arm” test and strongly suggests a significant rotator cuff tear. The drop arm test is highly specific, meaning if it’s positive, there’s a very good chance something is actually torn.
For labral tears, the signs are harder to self-assess. The most telling indicator at home is whether you feel clicking, catching, or a sense of instability during overhead reaching or throwing motions.
What Imaging Can and Can’t Tell You
If your doctor suspects a tear, you’ll likely get either an MRI or an ultrasound. Both are highly accurate for full-thickness rotator cuff tears, with sensitivity between 90% and 94% and specificity around 93% to 94%. For partial tears, MRI has a slight edge, detecting them 52% to 74% of the time compared to 52% to 68% for ultrasound. X-rays won’t show soft tissue tears directly but can rule out fractures or bone spurs.
Here’s something worth knowing: imaging often finds tears in people who have zero pain. A landmark study using ultrasound on pain-free shoulders found rotator cuff tears in 13% of people in their 50s, 20% in their 60s, 31% in their 70s, and a striking 51% of people over 80. This means that rotator cuff tears are, to a certain extent, a normal part of aging. A tear on an MRI doesn’t automatically mean it’s the source of your pain, which is why your symptoms and physical exam matter just as much as the scan.
Signs You Should Get It Checked Soon
Some symptoms warrant a prompt visit rather than a wait-and-see approach. If you experienced a sudden injury (a fall, a hard hit, or a forceful pull) followed by immediate pain and weakness, the odds of a significant tear are higher. A visible bulge in your upper arm after a popping sensation can indicate a biceps tendon rupture, sometimes called a “Popeye” deformity.
Go to an emergency room if you have extreme pain, swelling that’s getting worse, visible discoloration, or a complete inability to move your arm or shoulder. These can signal more serious injuries beyond a simple tear.
For less dramatic presentations, the general rule is that shoulder pain and weakness that haven’t improved after a few days of rest, ice, and avoiding aggravating movements deserve a professional evaluation. Many partial tears respond well to physical therapy and don’t require surgery. Even deep partial tears (more than 90% of the tendon thickness) are treated surgically only when nonsurgical approaches fail to control symptoms. Getting an accurate diagnosis early gives you the best range of options.