Not being able to lift our arm because of shoulder pain is actually a very common problem. Some of you simply woke up and couldn’t move your shoulder. Some of you may have had an injury yesterday and now find it hard to lift or move your shoulder. There are many common reasons for this. We are going to walk through five of the most common reasons why you can’t lift or move your shoulder.
Shoulder pain can be one of the more annoying and painful conditions. For many of you, you simply woke one morning and your shoulder hurts. Often that pain in on the top of the shoulder or the side of the shoulder.
Some of you might have severe pain when trying to sleep and others might only have shoulder pain when trying to lift the arm. These are not unusual issues when it comes to shoulder pain. Most of you will not recall a shoulder injury.
Most patients do not recall a change in their workouts or a more aggressive exercise regimen. In most instances, you are 40-60 years old, and this might be your dominant or your non-dominant arm.
There are three main reasons why you can’t lift your arm.
The first is pain. A painful rotator cuff or bursa will make it very challenging to lift your arm because it hurts so much. This is also the reason why you may have severe shoulder pain why trying to sleep.
The second reason is that you injured something. If you had a severe fall or injury then you may have torn a tendon. If the tendon tears are large enough that will cause significant weakness of the shoulder.
The third reason is neurological. Parsonage-Turner Syndrome is a rare cause of shoulder pain and weakness. We are not sure what causes it, but if often follows a viral illness. It starts off with very severe pain, but no loss of motion or weakness. Within a few weeks of onset, you will notice significant weakness around the shoulder. That weakness can be so severe that you have difficulty lifting the arm.
Losing the ability to move your shoulder is such a common problem. Because of that, we are going to review the most common reasons that will cause:
- Pain on top of the shoulder
- loss of shoulder motion
- Shoulder pain and difficulty when lifting the arm
- Causes of stiffness and difficulty in moving your shoulder.
There are many problems that can occur in the shoulder that can make it difficult or too painful to lift or move your shoulder. More often than not this is due to an issue with the rotator cuff or the “bursa” which sits above the rotator cuff.
The rotator cuff and bursa are the most common cause of pain and loss of motion in the adult shoulder. Rotator cuff pain is the number one reason why you have pain on the outside or top of your arm. It is also the main reason why you may not be able to lift or move your arm.
Shoulder pain could also be brought on by injury. Believe it or not, traumatic injuries are a less frequent cause of shoulder pain. Rotator cuff injuries can be caused by chronic repetitive stress from working out, throwing or overhead sports. Rotator cuff injuries can also be caused by a fall, or perhaps even a long day gardening or painting your house. It is not unusual to lose the ability to move your shoulder after a long day of chores that you don’t typically perform.
This should not be a cause for alarm. Most people who woke up and can’t move their shoulder because of pain will recover uneventfully within a few days or weeks.
The rotator cuff is a series of four muscles that are deep to or underneath your deltoid muscle. Together those four muscles control your shoulder motion and are critically important to the proper functioning of the shoulder.
5 Most Common Reasons You Cannot Lift Your Shoulder
Here are the most common reasons why you may not be able to move your arm. While there can be neurological reasons, like Parsonage-Turner Syndrome, most of you cannot move the arm or shoulder because of pain. The most common causes of shoulder pain and loss of motion are:
- rotator cuff tendonitis
- rotator cuff tendinosis
- rotator cuff tears
- partial rotator cuff tears
- calcific tendonitis
- adhesive capsulitis or a frozen shoulder
The cause of your shoulder pain and the reason why it hurts will vary by age. Some problems are more common in different age groups. In younger athletes, tendonitis, or inflammation of the rotator cuff is more common.
Let’s run through each of these individually.
Rotator Cuff Tendinosis
Rotator cuff tendinosis, by definition, implies some degree of rotator cuff degeneration. With that degeneration comes an increase in the numbers of nerves and blood vessels. That is the body’s response to the degeneration, and that is why the pain occurs.
Too many nerves in the area produce pain with certain motions. If the pain is severe enough you will be unable to raise your arm or unable to sleep on that side.
When patients have rotator cuff tendinosis, physical therapy is generally effective at managing the pain. If the pain persists despite therapy, we now have a biological patch that may be able to alleviate the pain due to tendinosis.
Many people who cannot lift their arm due to shoulder pain from rotator cuff tendinosis will be told that they have impingement syndrome and a bone spur. This video post discusses our current thoughts on bone spurs and shoulder pain.
Other posts about rotator cuff tendinosis:
Partial Rotator Cuff Tears
As the rotator cuff continues to age or degenerates, a portion of the rotator cuff might separate from the bone that it is normally attached to. This is usually part of the natural progression of tendinosis.
If enough of the rotator cuff starts to separate then we have a small cleft or defect in the rotator cuff attachment. We call that a partial tear. Partial tears are not large enough to cause weakness of the shoulder. However, if you have a painful partial tear, you can have pain on top or on the side of the shoulder. In addition, you may find it very painful when trying to lift the arm overhead.
Some partial tears hurt, while others do not. Determining if your partial tear is painful is usually possible with a physical exam. Most people with partial tears of the rotator cuff are going to respond to physical therapy. If physical therapy and other non-surgical treatments do not improve your pain, then surgery to place a unique biological patch has a high likelihood of alleviating your night pain and pain with lifting your arm. See this post for more information about the patch and how it works.
Traumatic Shoulder Pain
Some of you are reading this because you fell on your shoulder and now you can not move your arm. In acute traumatic situations like this, there is a chance that you ripped the rotator cuff off from the bone. If you fell, and now have significant weakness in your arm you should see an Orthopedic Surgeon soon. This post covers what to look for if you think you had a serious shoulder injury.
The rotator cuff controls how well the shoulder functions. If your injury caused a rotator cuff tear, your complaints and symptoms may be related to the size of the rotator cuff tear. If enough of the rotator cuff has torn then it might be impossible to move your arm due to severe weakness. Many people with acute, large, traumatic rotator cuff tears will require surgery in order to restore function. In general, the treatment of rotator cuff tears depends on the cause of the rotator cuff tear and I go into more detail in these posts here and here.
Calcific tendonitis of the rotator cuff can be a VERY painful entity.
You are usually very easy to diagnose in the office since the pain can at times be very significant. In this situation, calcium crystals deposit inside the tendon itself. That leads to a significant increase in the number of nerves in that area, and that causes severe pain.
Luckily, a non-surgical approach with an ultrasound-guided injection to wash the calcium out of the rotator cuff often results in pain relief in the majority of cases. Surgery is very rarely necessary for calcific tendonitis. For more in-depth information on calcific tendonitis please see these two articles here and here.
Adhesive capsulitis or a frozen shoulder is a very common cause pain and of loss of motion of the shoulder. A frozen shoulder causes pain all around the shoulder. The pain can be on the top of the shoulder, or the pain can be underneath the shoulder in the axilla.
In a frozen shoulder you cannot move the arm because the ligaments and capsule around the shoulder became very thick, tight and inflamed. We have a very popular post here that goes into significant detail about how to manage a frozen shoulder.
The diagnosis of a frozen shoulder is often straight-forward… since the definition of a frozen shoulder is loss of motion compared to the other shoulder.
The treatment of a frozen shoulder is generally physical therapy. On occasion, we might recommend an injection directly into the shoulder to diminish the inflammation. People who do not improve with physical therapy can consider an injection or an arthroscopy. During arthroscopy of the shoulder, the surgery is performed with small holes and cameras and the tight joint capsule is released. During that surgery, we can also remove or lengthen the tight inflamed tissue which is stopping the shoulder from moving.
Rotator Cuff Tendonitis
In people under 30 years of age, including youngsters, the most common cause of shoulder pain is because of rotator cuff tendonitis. This simply means that the rotator cuff is inflamed from performing too much activity. Often times rotator cuff tendonitis can be considered a training error at any age. A training error occurs if you add on a new activity or perform too many sets. A training error occurs if you jump in the pool and swim a mile after not swimming for a few weeks or months. In most cases of rotator cuff tendonitis due to over-training or improper training, the pain is going to go away within a few weeks as the shoulder gets used to your new routine.
In childhood (under 16), and particularly in overhead athletes, a stress fracture of the humerus is a possible cause of shoulder pain. These stress fractures actually involve the growth plates of a growing child. These fractures need to be identified early as rest results in healing. If these fractures are not identified early a young athlete could have lifelong shoulder issues. Usually, just an x-ray will suffice to diagnose these growth plate stress fractures.
In children and teenagers, rotator cuff tendonitis is usually associated with overhead sports and weight lifting. In teenagers, rotator cuff tendonitis can be caused by instability issues where the shoulder is trying to slide out of place. Instability will occur if the ligaments have become loose over time because of pitching, swimming, etc.
This is a more subtle form of instability than a youngster who was tackled or hit and dislocated their shoulder. Rotator cuff tendonitis due to instability is most commonly seen in children who are throwers, volleyball players and swimmers. By addressing the underlying instability issue with physical therapy both the instability and the secondary rotator cuff tendonitis will resolve. On occasion, surgery to address the instability can tighten the ligaments and this will also resolve the rotator cuff issue.
AC Joint Arthritis:
The AC Joint is a small joint on top of your shoulder. It is where your collar bone meets the shoulder blade. Many people notice a small bump above their shoulder. That is the AC joint. Over time that joint can suffer from arthritis. Arthritis of the AC joint is the number one cause of pain on top of the shoulder. If the pain from the AC joint is severe enough it will cause pain when trying to lift your arm or move your shoulder. Ice, heat, anti-inflammatory medications can all help ease the pain from an arthritic AC joint. Injections can be useful too. For people who do not respond or improve after these treatments surgery might be the right answer. The surgery involves clearing out the AC joint. This article on my site goes into more detail about AC joint arthritis and its treatment.
Shoulder pain when lifting the arm is very common. Most of the time it is not due to a single injury. We reviewed many of the most common causes of pain and treatments which are usually effective. Hopefully, this has helped you determine why your shoulder hurts and why it’s painful to lift that arm overhead.
Disclaimer: this information is for your education and should not be considered medical advice regarding diagnosis or treatment recommendations. Some links on this page may be affiliate links. Read the full disclaimer.