AC joint sprain: how shoulder separations recover with movement

Symptoms of AC joint sprain

Symptoms of this injury often occur on the top of your shoulder. You may notice some or potentially all of the following:

• Pain on top of your shoulder. It can spread toward your neck and is often worse when you move your arm.

• Swelling and bruising. The top of your shoulder may look puffy or discolored.

• Tenderness. The spot where your collarbone meets your shoulder blade is often sore to the touch.

• Limited movement. You may notice your range of motion is more limited than normal. That’s because pain can make it hard to lift or move your arm freely.

• A visible bump. In more severe sprains, the end of your collarbone can sit higher than usual.

• Trouble sleeping on that side. Lying on your tender shoulder often makes the pain worse.

What AC joint sprain grades mean

AC joint sprains range from mild injuries involving stretched ligaments to more severe injuries involving torn ligaments and changes in the position of your collarbone. Healthcare providers classify them into six grades based on the extent of your injury.

Grades 1 and 2 are generally mild and often the most common, while grade 3 involves more significant ligament damage and may cause a noticeable bump at the top of your shoulder. Grades 4 through 6 are more severe and typically require evaluation by an orthopedic specialist.

The grade helps guide treatment, but it isn’t the only factor that determines your recovery. Your symptoms, daily activities, and goals also matter.

Causes of AC joint sprain

An AC joint sprain usually happens after a fall or direct impact to your shoulder. Common causes include:

• A direct fall onto your shoulder. This is the most common cause. It can happen during a bike ride, while skiing, or after a slip and fall.

• A hard hit during sports. Contact sports like football and hockey can involve collisions or falls that injure the AC joint.

• Landing on an outstretched arm. Sometimes an AC joint sprain happens when you extend your arm to catch yourself during a fall.

How long an AC joint sprain takes to heal

Healing time depends on the severity of the injury and the activities you want to return to. Mild sprains may improve within a few weeks, while more significant injuries can take several months to recover.

With nonsurgical care, many people regain functional movement by about six weeks and return to normal activity by about 12 weeks, although recovery varies.

But instead of focusing on a specific timeline, pay attention to improvements in your pain, movement, and strength. Being able to comfortably reach overhead, lift everyday objects, and gradually return to exercise can all be signs of progress.

How movement can help AC joint sprain

It’s natural to feel like you don’t want to move your shoulder much when it hurts, especially if you’re wearing a sling. Doing gentle movements, once your care team says it’s okay to do so, can help you gradually regain mobility and confidence using your arm.

Physical therapy can help you restore comfortable movement, rebuild strength, and work toward activities that you’re used to doing daily, whether that’s reaching into a cabinet, carrying groceries, or returning to sports.

As your symptoms improve, a physical therapist can help you gradually increase the challenge of your exercises. You can also stay active in other ways, such as walking or doing lower-body exercises that don’t aggravate your shoulder.

“The two patterns I see most often are people who barely move their injured arm and people who jump straight back into their full routine. What usually works best is somewhere in between: enough movement that your arm feels a bit more capable each week, without soreness that lingers. In the meantime, walking or doing workouts that give your shoulder a break can keep you active as it heals,” says Dr. Martinez.

Treatments for AC joint sprain

Most mild AC joint sprains improve with nonsurgical treatment. Even some more significant injuries can heal without surgery. In fact, a study of people with grade 3 AC joint separations found similar shoulder function and range of motion two years after surgical and nonsurgical treatment. The best approach depends on the severity of your injury, your symptoms, and your activity goals. Consider the following:

• Try physical therapy and targeted exercises. Targeted exercises, such as the ones above, help improve shoulder mobility and strength as it heals from an AC joint sprain.You can do exercise therapy at home or work with a physical therapist who can guide you through movements tailored to your needs. You can see a physical therapist in person or use a program like Hinge Health, where you may access a PT via telehealth/video visit.

• Stay active. Targeted AC joint sprain exercises are designed to help with recovery, but any type of movement — like walking, stretching, or even certain household chores — can improve circulation and help you feel more confident moving your arm. Check with your provider before starting any new exercise program.

• Over-the-counter (OTC) medication. Pain relievers such as ibuprofen (Advil, Motrin), naproxen (Aleve), and acetaminophen (Tylenol) can help ease pain so you can do your targeted exercises and stay active when you have AC joint pain. Other options are topical NSAIDs or pain relief creams. If you have a medical condition or take other medications, check in with your provider to make sure these OTC options are safe to take.

• Apply heat or ice. Cold therapy can help ease swelling and numb nerve pain. Heat, on the other hand, can help ease muscle stiffness and help increase blood flow to the tender area. Try alternating between the two methods or stick to the one that works best for you.

• Consider complementary treatments. Talk to your provider if you're interested in trying alternative treatments for shoulder pain relief, such as massage, acupuncture, or chiropractic care.

• Consider lifestyle modifications. Factors like sleep, stress, nutrition, and certain activities can all play a role in how you feel. In fact, many people are surprised to learn that pain isn't just about what's happening physically — your daily habits and overall well-being can have a real impact, too. Staying curious about how your routines affect your muscles and joints can help you identify where small changes might help reduce pain. For example, you might notice your pain is less noticeable on low-stress days.

• Ask About TENS therapy. TENS, or transcutaneous electrical nerve stimulation, uses gentle pulses to quiet your pain response and help reduce shoulder pain. One option is the wearable device Enso, available through Hinge Health. It’s small, wireless, and portable.

• Talk to your doctor about surgery for more severe sprains. Most AC joint sprains heal without surgery, but it may be recommended for more severe injuries or when pain and difficulty using your shoulder persist despite nonsurgical treatment. Your provider can help determine the best approach based on your injury and activity goals.

How to prevent AC joint sprain

Like any injury, AC joint sprains aren’t always preventable. But staying active and building shoulder strength can help prepare your body for unexpected movements and impacts, whether that’s a collision during sports or a slip and fall.

Regular strengthening exercises for your shoulders, upper back, and arms are a great starting point. If you play contact sports, practicing appropriate tackling or falling techniques with a coach may also help reduce injury risk.

When returning to sports after an AC joint sprain, it’s important to gradually increase the intensity of your activities as your strength and movement improve. A physical therapist can help you develop a return-to-sport plan that matches your goals.

Tips to manage AC joint sprain

A few small changes to how you sleep, pace your workouts, and reach for things can make your shoulder more comfortable while it heals. Consider these tips recommended by Hinge Health physical therapists:

• Try pillow support at night. If sleeping on your injured shoulder is uncomfortable, try lying on your back or opposite side. Resting your arm on a pillow may help you find a more comfortable position.

• Pace your activities. If a workout or sports practice starts to stir up your shoulder symptoms, try splitting it into shorter sessions with breaks in between. The goal is to find your movement sweet spot, or enough activity to keep your shoulder moving, without doing more than it can handle right now.

• Adjust how you reach. If reaching overhead or across your body bothers your shoulder, try changing how you do it for now rather than avoiding the movement altogether. “Use your other hand to support the injured arm at the elbow as you lift it, so your shoulder can move while it does less of the work,” says Dr. Martinez.

• Celebrate small improvements. Recovery doesn’t always happen in a straight line. Notice when everyday activities, such as getting dressed, reaching for a cup, or carrying a light bag, start to feel easier. These changes can help you recognize progress even if you still have some discomfort.

When to see a doctor

Because AC joint sprains often follow a fall or direct impact, it's important to have a suspected injury evaluated by a healthcare provider. An examination, and sometimes imaging, can help determine the severity and appropriate treatment.

Seek prompt medical attention if you experience:

• Severe pain or significant swelling after an injury

• A noticeable change in the shape of your shoulder

• Difficulty lifting your arm or using it for everyday activities

• Numbness, tingling, or weakness in your arm or hand

• Symptoms that worsen or don't improve as expected

Be sure to seek emergency care if your hand becomes cold or pale, you lose feeling or movement in your arm, or the injury is accompanied by signs of a more serious trauma.

PT tip: Take short, but frequent, movement breaks

Once you’ve been cleared to move your shoulder, try gentle movements like shoulder rolls or slowly raising and lowering your arm, staying within a comfortable range of motion.

"Your shoulder can feel stiffer after it's been still for a while, like first thing in the morning or after a long drive. Short, frequent movement breaks are often easier on a healing shoulder than one long session. They keep it moving without asking too much of it at once. Even a minute or two every hour or so can help it feel looser," says Dr. Martinez.

How Hinge Health can help you

If you have joint or muscle pain that makes it hard to move, you can get the relief you’ve been looking for with Hinge Health’s online exercise therapy program.

The best part: You don’t have to leave your home because our program is digital. That means you can easily get the care you need through our app when and where it works for you.

Through our program, you’ll have access to therapeutic exercises and stretches for your condition. Additionally, you’ll have a personal care team to guide, support, and tailor our program to you.

See if you qualify for Hinge Health and confirm free coverage through your employer or benefit plan here.