Women, adults between 40 and 60, and people with diabetes or thyroid disease develop frozen shoulder more often than other groups. It can also follow an injury or a period when the shoulder has to stay still, though many cases have no clear cause.
This article explains who is most at risk, what may trigger the condition, and which common beliefs are misleading. You’ll also learn what symptoms to watch for, how clinicians assess a stiff shoulder, and what practical steps can help protect movement without aggravating pain.
who develops frozen shoulder more often?
Frozen shoulder, also called adhesive capsulitis, is more common in women and in adults roughly 40 to 60 years old. People with diabetes or thyroid disorders also have a higher likelihood of developing it. A shoulder injury, surgery, or other period of limited movement can raise the risk too.
These are patterns, not a way to diagnose yourself. Frozen shoulder can affect someone outside the typical age range, and having a risk factor does not mean the condition is inevitable. Many people who develop it have no obvious trigger.
The condition involves thickening and tightening of the capsule, the tough tissue surrounding the shoulder joint. That capsule normally allows the joint to move freely. When it tightens, pain and stiffness make reaching, dressing, and sleeping more difficult.
Age and sex: the most common patterns
Frozen shoulder is seen most often in middle adulthood. It is less common in younger adults and uncommon in people over 70. These are general patterns, not strict boundaries; age alone cannot confirm or rule out the condition.
Women develop frozen shoulder more often than men. Researchers have not established one simple reason for this difference. Hormonal changes around menopause have been suggested as a possible influence, but they do not explain every case and should not be treated as a proven cause.
Frozen shoulder usually affects one shoulder at a time. The other shoulder may become affected later in some people, but this is not guaranteed. Having it on one side does not mean the opposite shoulder will inevitably become stiff.
Health conditions linked with frozen shoulder
Diabetes is one of the clearest health conditions associated with frozen shoulder. The condition occurs more often among people with diabetes, and it may affect both shoulders over time. Blood sugar management matters for overall health, but it does not guarantee that frozen shoulder can be prevented or cured.
Thyroid disorders, including an underactive or overactive thyroid, are also associated with a higher likelihood. If you have a thyroid condition and develop persistent shoulder stiffness, mention both facts to your clinician. The association does not prove that the thyroid problem directly caused the shoulder symptoms.
Other long-term health conditions may be linked in some studies, but the strength of evidence varies. A clinician will consider your overall health and symptoms rather than assuming that any one diagnosis explains the shoulder problem.
Risk factor comparison
| Factor | How it relates | Practical takeaway |
|---|---|---|
| Age 40–60 | This is the age range in which frozen shoulder is most often recognized. | Persistent stiffness deserves attention, but age is not a diagnosis. |
| Being a woman | Women are affected more often; the reason is not fully understood. | Do not assume hormonal changes are the sole cause. |
| Diabetes | Frozen shoulder is more common among people with diabetes. | Report new, lasting stiffness and discuss your health history. |
| Thyroid disease | Both underactive and overactive thyroid disorders are associated with increased likelihood. | Share your thyroid history during an assessment. |
| Injury or immobilization | Reduced shoulder movement after injury or surgery can contribute to stiffness. | Follow an approved movement plan; do not force painful motion. |
Injury, surgery, and keeping the arm still
Frozen shoulder can develop after an injury or operation if pain or medical instructions lead to a long period of reduced shoulder movement. This is sometimes called secondary frozen shoulder because a preceding event may be involved. The connection is not always straightforward: the original injury, pain, or another shoulder problem may also be responsible for stiffness.
Immobilization does not mean every sling or short rest will cause frozen shoulder. A sling may be necessary to protect an injury or surgical repair. The important point is to follow the treating clinician’s instructions about when and how to begin moving the shoulder.
After an injury or surgery, ask which movements are safe, when to start them, and what level of discomfort is acceptable. Avoid adding exercises or stretching beyond the prescribed plan. Too much motion too soon can harm healing tissue, while unnecessary prolonged stillness can make stiffness harder to address.
Why frozen shoulder happens—and why the cause is often unclear
Clinicians often describe frozen shoulder as primary or secondary. Primary, sometimes called idiopathic, means no clear trigger has been identified. Secondary means it appeared alongside a known event or condition, such as surgery, injury, or reduced movement.
In either case, the joint capsule becomes irritated and tight. The joint then has less room to move, and even ordinary motions can hurt. Pain can lead you to protect the arm, which may further limit movement. This cycle helps explain why symptoms can build gradually rather than appearing all at once.
The exact biological process is not fully understood. Risk factors point to who is more likely to develop the condition, but they do not explain every case. There is no single action, posture, or everyday activity that can be blamed for most frozen shoulders.
Common symptoms and the usual progression
Frozen shoulder typically causes shoulder pain and a gradual loss of movement. Reaching overhead, reaching behind your back, putting on a coat, or lying on the affected side may become difficult. Stiffness usually affects both your ability to move the arm yourself and the movement someone else can produce for you.
Symptoms are often described in three overlapping phases. The timing varies, and not everyone follows the same pattern:
- Freezing: Pain increases and movement becomes more limited. This phase can last for months.
- Frozen: Pain may ease, but stiffness can remain prominent. Everyday tasks may still be difficult.
- Thawing: Movement gradually improves. Recovery can take many months, and some people have lingering limits.
These phases are a broad description, not a timetable you can use to predict exactly when your shoulder will recover. Significant pain or stiffness should not be ignored simply because frozen shoulder sometimes improves over time.
How clinicians distinguish it from other shoulder problems
Shoulder pain and stiffness can have several causes, including rotator cuff problems, arthritis, a fracture, or pain referred from elsewhere. Frozen shoulder is more likely when both active movement (movement you make yourself) and passive movement (movement an examiner helps produce) are restricted, particularly in more than one direction.
A clinician will ask when symptoms started, whether there was an injury or operation, and how your shoulder moves during daily activities. They may examine the shoulder and compare its motion with the other side. Your history of diabetes, thyroid disease, and other health conditions can also help guide the assessment.
Imaging is not always needed to identify frozen shoulder. An X-ray may be used to check for other causes, such as arthritis or a fracture. Other tests depend on your symptoms and examination. Do not assume that one scan alone can explain every case of shoulder stiffness.
What you can do if you have risk factors
There is no guaranteed way to prevent frozen shoulder, especially when it arises without a clear cause. Still, you can reduce avoidable stiffness after an injury or procedure by asking for clear guidance on safe movement. If you have diabetes or thyroid disease, keep up with your regular care and report new shoulder symptoms rather than waiting until movement is severely limited.
Use these practical steps:
- Ask your clinician which shoulder movements are safe after an injury or surgery.
- Follow the recommended schedule for rest, movement, and rehabilitation.
- Tell your care team if pain is stopping you from doing approved exercises.
- Track changes in pain, sleep, and everyday movement so you can describe them clearly.
- Avoid forcing a stiff shoulder through sharp pain or copying an exercise plan meant for someone else.
One point people often get wrong: keeping the shoulder moving does not mean pushing through severe pain. Gentle, approved motion may help maintain function, but aggressive stretching can irritate the shoulder and make symptoms harder to manage. The right level of activity depends on the cause of the problem and any recent surgery or injury.
Care options and what to expect
Treatment aims to reduce pain and restore useful movement. A clinician may recommend activity adjustments, pain relief, or physical therapy, depending on your health and the stage of symptoms. A physical therapist can tailor movements to your range and explain how to progress without repeatedly provoking a strong flare.
For some people, a clinician may discuss an injection or another treatment if pain is limiting movement and daily function. The best option depends on your diagnosis, medical history, and preferences. Procedures are not necessary for everyone, and no single treatment produces the same result for every person.
Recovery often takes time. A gradual plan is usually more sensible than trying to regain full movement in a few days. Ask what improvement to look for, what symptoms mean you should pause an exercise, and when to return for reassessment if progress stalls.
When to seek medical advice
Arrange an assessment if shoulder pain and stiffness persist, worsen, disturb sleep, or make routine tasks difficult. Early evaluation can help distinguish frozen shoulder from other conditions and identify a safe plan, especially if you have diabetes, thyroid disease, a recent injury, or recent surgery.
Seek urgent medical attention for severe pain after a significant injury, a visibly deformed shoulder, sudden inability to move the arm after trauma, or a hot, red shoulder with fever. Chest pressure, shortness of breath, sweating, or pain spreading to the jaw or arm may indicate an emergency unrelated to frozen shoulder; call emergency services.
Risk factors can help explain why a clinician considers frozen shoulder, but they cannot confirm it. The combination of your symptoms, movement examination, and medical history is what guides the next step.
Frozen shoulder develops more often in women, adults around 40 to 60, and people with diabetes or thyroid disease. Injury, surgery, or extended limits on shoulder movement can also play a role, but many cases have no clear cause.
If stiffness is affecting daily tasks, arrange an assessment and describe when it began, your health conditions, and any recent injury or procedure. If your shoulder is recovering from an injury or surgery, ask your care team which movements are safe before changing your activity.