Why Does My Shoulder Hurt When I Reach Behind My Back?
Some shoulder problems are barely noticeable until you try one very specific movement:
Reaching behind your back.
You may notice it when:
- Putting on a jacket
- Tucking in your shirt
- Reaching for a back pocket
- Fastening a bra
- Putting on a belt
- Washing your back
- Reaching behind the seat in your car
For some patients, the movement is painful.
For others, the bigger surprise is discovering that the arm simply doesn’t reach as far as it used to.
They may compare sides and realize one hand reaches comfortably between the shoulder blades while the other barely reaches the lower back.
That difference can provide useful information about what is happening within the shoulder.
Reaching Behind Your Back Is a Complex Shoulder Movement
It may seem like a simple motion, but reaching behind the back requires several movements to occur together.
The shoulder must combine:
- Internal rotation
- Extension
- Movement of the shoulder blade
- Coordinated motion of the upper arm within the socket
The elbow and wrist also change position to allow the hand to travel farther up the back.
If any part of that system becomes painful or restricted, the movement may become difficult.
This is why patients sometimes have relatively normal forward or overhead movement yet struggle significantly when reaching behind themselves.
Why Internal Rotation Matters
One important component of reaching behind the back is shoulder internal rotation.
Internal rotation occurs when the upper arm rotates inward within the shoulder socket.
You use this motion during many everyday activities without thinking about it.
When internal rotation becomes restricted, patients may first notice difficulty with tasks involving the hand behind the body.
That restriction may develop because of:
- Joint stiffness
- Capsular tightness
- Pain
- Arthritis
- Frozen shoulder
- Rotator cuff problems
- Protective muscle guarding
Determining whether the movement is limited by pain, stiffness, weakness, or a combination of these factors helps guide treatment.
Frozen Shoulder
Frozen shoulder is one of the conditions we consider when a patient has progressively lost the ability to reach behind the back.
In frozen shoulder, the joint capsule becomes painful and increasingly restricted.
Patients may notice difficulty:
- Reaching overhead
- Reaching behind the body
- Putting on clothing
- Washing or styling their hair
- Sleeping comfortably
A particularly important feature is that the shoulder is restricted not only when the patient tries to move it, but also when the examiner attempts to move it passively.
This helps distinguish frozen shoulder from several other shoulder conditions.
Rotator Cuff Problems
The rotator cuff consists of four muscles and their tendons that help control and stabilize the shoulder.
Certain rotator cuff problems may make reaching behind the back painful.
The subscapularis, one of the four rotator cuff muscles, contributes to internal rotation of the shoulder.
However, pain during this movement does not automatically mean the subscapularis is torn or injured.
Other shoulder structures are placed under stress during the same motion.
A complete examination is necessary before assigning the pain to one particular tendon.
Shoulder Impingement and Tendon Irritation
Patients with irritated shoulder tendons may notice pain near the end of certain movements.
Reaching behind the back can place the shoulder into a position that stresses already sensitive tissues.
Symptoms may include:
- Sharp shoulder pain
- Pain along the front or outside of the shoulder
- A pinching sensation
- Difficulty moving farther because of discomfort
In these cases, the patient may technically have enough joint mobility to complete the movement but stop because pain prevents them from continuing.
That is different from a shoulder that has become mechanically stiff.
Biceps Tendon Irritation
The long head of the biceps tendon travels through the front of the shoulder.
Certain positions involving extension of the arm behind the body may place additional stress on this tendon.
Patients with biceps tendon irritation often report pain near the front of the shoulder.
They may also notice symptoms with:
- Lifting
- Pulling
- Carrying
- Overhead activity
- Weight training
Because biceps tendon problems often occur alongside rotator cuff or other shoulder conditions, the entire shoulder should be evaluated.
Shoulder Arthritis
Arthritis can gradually reduce shoulder motion.
Unlike a sudden injury, patients may not immediately recognize how much mobility they have lost.
Instead, they adapt.
They may begin:
- Dressing differently
- Using the opposite arm
- Avoiding certain movements
- Asking for help with clothing
- Changing how they wash their back
Eventually, they realize the affected shoulder no longer moves the way it once did.
Arthritis may produce:
- Stiffness
- Deep aching
- Grinding or creaking
- Reduced range of motion
- Pain after activity
The degree of functional limitation does not always perfectly match the amount of arthritis visible on an X-ray.
Is It Pain or Is It Stiffness?
This is one of the most useful distinctions when evaluating this complaint.
Suppose two patients can only reach their hand to their belt line.
The first patient says:
“I could go farther, but it hurts too much.”
The second says:
“That’s it. The shoulder just won’t move any farther.”
Those may represent two very different clinical situations.
One shoulder may primarily be limited by pain.
The other may have a substantial loss of joint mobility.
Understanding why the movement stops is often more informative than simply measuring how far the hand reaches.
Why Comparing Sides Can Be Helpful
Patients often notice the problem by comparing one arm with the other.
For example, one hand may comfortably reach between the shoulder blades while the painful side only reaches the lower back.
That comparison can be useful, but it should not be interpreted too rigidly.
People naturally have differences between sides based on:
- Dominant hand
- Previous injuries
- Sports participation
- Occupational demands
- Individual anatomy
The objective is not necessarily to make both shoulders perfectly identical.
The more important question is whether the difference represents a meaningful change in the patient’s normal function.
Don’t Force a Painful Shoulder Behind Your Back
When patients discover that one shoulder has become stiff, they sometimes repeatedly force the arm farther up the back in an attempt to “stretch it out.”
That is not always appropriate.
Aggressive stretching of an irritated shoulder may increase symptoms, particularly when the underlying condition has not been identified.
Mobility exercises can be very useful when prescribed appropriately.
But the amount, direction, and intensity of stretching should match the diagnosis.
A shoulder with frozen shoulder, tendon irritation, arthritis, instability, or a recent injury may require different approaches.
When Should This Problem Be Evaluated?
Consider having your shoulder evaluated when:
- Reaching behind your back is becoming progressively more difficult
- One shoulder has lost substantial motion compared with its previous ability
- Pain persists for several weeks
- Nighttime pain is developing
- You notice weakness
- Other shoulder movements are becoming restricted
- Symptoms began after an injury
- Normal dressing or hygiene activities have become difficult
A seemingly small limitation—such as difficulty reaching a back pocket—can sometimes be one of the earliest clues that shoulder function is changing.
Identifying why the motion has been lost allows treatment to address the actual problem rather than simply forcing the shoulder farther into a painful position.
How Doyle Chiropractic Evaluates Pain When Reaching Behind Your Back
When a patient has difficulty reaching behind the back, simply measuring how far the hand travels does not tell us enough.
We want to determine why the movement stops.
Is the shoulder truly stiff?
Does pain prevent further movement?
Is weakness contributing?
Or are several factors occurring together?
During your examination, Dr. Geoffrey Doyle may evaluate:
- Active shoulder range of motion
- Passive shoulder range of motion
- Internal and external rotation
- Rotator cuff strength
- Shoulder joint mobility
- Shoulder blade mechanics
- Areas of tenderness
- Specific orthopedic tests
- Cervical and upper-back function
- Functional activities that reproduce symptoms
- Whether imaging or referral is appropriate
Comparing active and passive motion can be particularly useful.
If the patient cannot move the shoulder farther but the examiner can move it considerably farther, pain, weakness, or muscular control may be limiting the movement.
If both active and passive motion are substantially restricted, joint or capsular stiffness becomes more important to consider.
Treatment Depends on Why the Motion Is Limited
There is no single treatment for difficulty reaching behind the back.
A patient with frozen shoulder may need a gradual mobility-focused approach.
Someone with rotator cuff or biceps tendon irritation may initially need to reduce aggravating loads while improving strength and shoulder mechanics.
A patient with arthritis may benefit from maintaining available motion and improving the strength of the surrounding muscles.
That is why simply giving every patient the same shoulder stretches can miss the underlying problem.
The treatment should match the diagnosis.
Chiropractic Adjustments
Shoulder movement depends on more than the glenohumeral joint itself.
The shoulder blade, upper back, ribs, and cervical spine all contribute to efficient upper-body mechanics.
When restricted joint motion in these areas is contributing to the patient’s functional limitation, chiropractic adjustments may be incorporated into the treatment plan.
The objective is to improve motion where it is actually restricted—not simply make every part of the shoulder complex more mobile.
This distinction becomes especially important in patients who may already have instability or excessive joint mobility.
Class IV Laser Therapy
When irritated tendons, bursae, muscles, or other soft tissues are contributing to painful movement, Class IV laser therapy may be used when clinically appropriate.
Laser therapy delivers therapeutic light energy to affected tissues to support the body’s normal healing processes.
For some patients, reducing tissue irritation makes it easier to begin restoring movement and participating in rehabilitation.
Laser therapy does not mechanically restore lost range of motion by itself, so it is generally incorporated as part of a broader treatment strategy.
Soft Tissue Therapy
Protective muscle guarding can develop when a shoulder has been painful for an extended period.
Muscles surrounding the shoulder may tighten in an attempt to protect the area, which can make normal movement feel even more restricted.
Soft tissue treatment may help:
- Reduce excessive muscle tension
- Improve tissue mobility
- Improve flexibility
- Reduce protective guarding
- Make movement more comfortable
As symptoms improve, active movement and exercise become increasingly important.
Therapeutic Exercise and Mobility
Exercise selection depends heavily on why the patient cannot reach behind the back comfortably.
Rehabilitation may include:
- Gradual range-of-motion exercises
- Rotator cuff strengthening
- Shoulder blade stabilization
- Mobility exercises
- Postural control
- Upper-back mobility
- Functional reaching movements
For a stiff shoulder, mobility may receive greater emphasis.
For a painful but relatively mobile shoulder, improving strength and movement control may be more important.
The goal is not to force the hand as high up the back as possible.
The goal is to restore the useful movement required for normal daily life.
Functional Progress Matters
Range-of-motion measurements are useful, but patients rarely come into the office because they are concerned about a particular number of degrees.
They come because something they used to do has become difficult.
Progress may therefore mean being able to:
- Put on a jacket normally
- Fasten clothing
- Reach a back pocket
- Tuck in a shirt
- Wash the back
- Put on a belt
- Reach behind the seat of a car
These everyday activities provide meaningful benchmarks for recovery.
The Dr. Doyle Perspective
“One thing I pay attention to when somebody can’t reach behind their back is what actually stops them. There’s a big difference between saying, ‘I could go farther, but it hurts,’ and saying, ‘That’s as far as the shoulder physically goes.’ Those two patients may look similar at first, but they can require very different treatment. I don’t want someone aggressively stretching a painful tendon when the problem isn’t really a lack of flexibility.”
— Dr. Geoffrey Doyle, DC
Our Clinical Experience
Loss of behind-the-back movement often develops so gradually that patients compensate without realizing it.
They may start using the opposite hand to put on a belt, change how they put on a jacket, or stop reaching into a back pocket.
By the time they seek care, they sometimes cannot remember exactly when the restriction began.
That history matters.
A shoulder that became suddenly painful and restricted after an injury deserves a different level of consideration from one that gradually stiffened over many months.
We also find that the quality of improvement matters more than simply forcing greater range of motion.
If a patient gains a few inches of reach but every attempt produces substantial pain afterward, that is not necessarily useful progress.
We would rather see movement return gradually while the shoulder becomes:
- More comfortable
- Stronger
- Better controlled
- More useful during everyday activities
That is a more meaningful measure of recovery.
What If One Shoulder Has Always Been Less Flexible?
Not every difference between shoulders represents a problem.
Dominant-side activities, previous sports participation, old injuries, and normal anatomical variation can create differences in motion.
For example, some athletes develop predictable changes in shoulder rotation after years of repetitive throwing.
The important questions are:
Is this limitation new?
Is it painful?
Is it interfering with function?
A long-standing, painless difference may require no treatment at all.
When Is Imaging Appropriate?
Not everyone with limited behind-the-back movement requires imaging.
X-rays, MRI, or other studies may be considered when the history and examination suggest:
- Significant trauma
- Advanced arthritis
- Rotator cuff injury
- Substantial tendon injury
- Labral pathology
- Persistent weakness
- Progressive loss of motion
- Symptoms that fail to improve as expected
Imaging is most useful when it helps answer a specific clinical question or changes treatment decisions.
When Should You Seek Prompt Medical Evaluation?
Seek timely evaluation if shoulder symptoms include:
- Sudden inability to move the arm after trauma
- Significant weakness
- Visible deformity
- Severe swelling
- Progressive numbness or tingling
- Fever, redness, or warmth around the joint
- Rapidly worsening pain
- Significant loss of motion following an injury
These symptoms may indicate a condition requiring additional medical evaluation.
Frequently Asked Questions
Why can I reach overhead but not behind my back?
These movements require different combinations of shoulder motion. Reaching behind the back relies heavily on internal rotation and extension, which may become restricted even when overhead motion remains relatively good.
Does difficulty reaching behind my back mean I have frozen shoulder?
Not necessarily. Frozen shoulder is one possibility, but rotator cuff problems, arthritis, tendon irritation, pain, muscle guarding, and other conditions may also limit the movement.
Should I stretch my arm farther up my back every day?
Not automatically. Stretching may be appropriate for some conditions, but aggressively forcing a painful shoulder can aggravate others. The correct approach depends on why the motion is limited.
Why is one arm able to reach much higher than the other?
Some difference between sides is normal. The significance depends on whether the difference is new, painful, progressively worsening, or interfering with normal activities.
Can arthritis make it difficult to reach behind my back?
Yes. Arthritis may gradually reduce shoulder mobility and make combined movements such as internal rotation and extension increasingly difficult.
Can chiropractic care improve shoulder mobility?
For appropriately selected patients, chiropractic care may help address restricted joint motion and mechanical contributors involving the shoulder complex, upper back, ribs, and neck. Treatment depends on the underlying diagnosis.
Will I need an MRI?
Not necessarily. Many shoulder conditions can initially be evaluated through the history and physical examination. Imaging may be recommended when significant structural injury is suspected or progress does not occur as expected.
