Why Does My Shoulder Hurt When I Reach Overhead or Behind My Back?
You can carry groceries without much trouble. You can type, drive, or walk comfortably. Then you reach into a high cabinet and your shoulder hurts.
Or maybe reaching overhead feels fine, but reaching behind your back to put on a coat, fasten clothing, or tuck in a shirt causes a sharp pinch or makes your shoulder feel stuck.
Why can one shoulder movement hurt while others feel completely normal?
The answer often has to do with how much mobility, strength, and coordination a particular movement requires. Your shoulder doesn’t work by itself. Several areas have to work together to position your arm comfortably.
Reaching Is More Complicated Than It Looks
When you raise your arm overhead, movement does not occur only at the ball-and-socket joint of your shoulder.
Your shoulder blade also moves along your rib cage as your arm rises. Muscles around the shoulder and shoulder blade help control that motion while other muscles provide the strength needed for the task.
Your upper back contributes as well.
When these areas work together efficiently, reaching can feel smooth and easy. But if one part of the system is limited or not contributing as well as it could, another area may have to compensate.
That can change how the shoulder handles the movement and may contribute to pain raising the arm overhead.
Why Can Reaching Behind Your Back Feel Different?
Reaching behind your back asks your shoulder to move in a very different combination of directions.
Think about reaching for a back pocket compared with reaching for something on a high shelf. Both involve the shoulder, but the joint and surrounding muscles have to move and control your arm differently.
That is why someone can have shoulder pain reaching behind the back while reaching forward feels completely comfortable.
The location of the pain alone does not explain why one direction is difficult. The pattern of which movements are limited or painful can provide useful information about what may be contributing.
Is a Tight Shoulder Always the Problem?
If your shoulder feels stiff, stretching seems like the obvious solution.
Sometimes improving mobility is important. But limited motion is only one possibility.
Your shoulder may have enough motion but lack the strength or control needed to use that range comfortably. In other cases, the shoulder blade or upper back may not be contributing effectively to the movement.
This distinction matters because two people can have pain during the same reaching motion for very different reasons.
One person may primarily need better mobility. Another may need improved strength or coordination. Someone else may have several contributing factors.
Simply stretching every painful shoulder assumes the problem is the same for everyone.
What Does Your Shoulder Blade Have to Do With It?
Your shoulder blade provides a moving base for your arm.
As you lift your arm, the shoulder blade normally changes position to help the shoulder joint move efficiently. Muscles around the shoulder blade help guide and control this movement.
If the shoulder blade is not moving or being controlled well for the demands of the activity, the shoulder may have to work differently.
This does not mean there is one “perfect” shoulder blade position that everyone needs to maintain. Shoulder movement naturally varies from person to person.
The important question is whether the different parts of your shoulder system are working together well enough for the activities you want to perform.
Why Does This Matter in Everyday Life?
Shoulder pain with reaching can become frustrating because reaching is part of so many ordinary activities.
You reach overhead to put away dishes, change a light bulb, lift luggage into an overhead compartment, or get something from a closet. You reach behind yourself while dressing, putting on a jacket, fastening clothing, or reaching into the back seat of a car.
Exercise and recreation may demand even more. Swimming, tennis, golf, weight training, gardening, and many other activities require your shoulder to move through different positions while producing or controlling force.
A painful movement may therefore become noticeable long before you think of yourself as having a “shoulder problem.”
Should You Avoid the Movement That Hurts?
Pain during a particular reaching movement does not automatically mean you are causing damage every time you move your arm.
At the same time, repeatedly forcing through significant pain is not necessarily the answer.
What makes sense depends on the individual situation, including how the symptoms started, which movements are affected, how severe they are, and whether there are other concerning symptoms.
The larger question of when to rest, modify an activity, or keep moving deserves its own discussion. For now, recognize that the way your shoulder responds to different movements can provide valuable clues.
The Good News
Having shoulder pain with reaching does not automatically mean you need to stop using your arm or give up the activities you enjoy.
Because reaching depends on several factors working together, there may be specific areas of mobility, strength, or movement control that can be identified during an evaluation.
That is also why individualized treatment matters. The goal is not simply to give everyone with shoulder pain the same stretches or exercises. It is to understand what may be limiting your movement and address the factors that are relevant to you.
What If Reaching Keeps Hurting?
Start by noticing which movements are difficult.
Does your shoulder hurt only overhead? Is reaching behind your back harder? Does the pain occur at the beginning of the movement, somewhere in the middle, or only near the end?
Those details can help distinguish one movement pattern from another.
If shoulder pain with reaching continues to limit dressing, exercise, work, household activities, or recreation, a one-on-one physical therapy evaluation can assess your shoulder mobility, strength, shoulder blade function, and other factors that may be contributing.
A FREE Discovery Visit gives you an opportunity to speak with a physical therapist about what you’re experiencing and determine whether an individualized physical therapy approach may be an appropriate next step.