What is frozen shoulder and what are the symptoms? Frozen shoulder is a condition in which the tissue around the shoulder joint becomes thick and tight, causing pain and a marked loss of movement. The pain may worsen at night, and reaching overhead or behind your back can become difficult.
This article explains how frozen shoulder develops, how its symptoms can change over time, and how clinicians distinguish it from other shoulder problems. You will also find practical guidance on diagnosis, treatment, safe movement, and when to seek prompt medical care.
What is frozen shoulder and what are the symptoms?
Frozen shoulder, also called adhesive capsulitis, is stiffness and pain caused by changes in the capsule surrounding the shoulder joint. The capsule is a sleeve of connective tissue that helps hold the ball of the upper arm in the shoulder socket. When it becomes inflamed, thickened, and tight, the joint has less room to move.
The defining feature is not pain alone. Both active and passive movement become restricted: you have trouble moving your arm yourself, and another person cannot move it as far as expected either. This differs from some conditions in which pain or weakness limits your effort but the joint can still be moved farther with help.
Symptoms often build gradually. Common signs include a deep ache, pain when moving the arm, trouble reaching overhead or behind your back, and difficulty with dressing, washing your hair, or fastening clothing. The shoulder may hurt more at night, especially when you lie on the affected side.
Frozen shoulder usually affects one shoulder at a time. It can occur without a clear cause, but the risk is higher after a period when the shoulder has not moved much, such as after surgery or an injury. It is also more common in people with diabetes or certain thyroid conditions.
How frozen shoulder symptoms change over time
Clinicians often describe frozen shoulder in three phases. These phases are a useful way to explain the general pattern, not a precise timetable. They can overlap, and not everyone experiences them in the same order or with the same intensity.
| Phase | What you may notice | Movement | Practical focus |
|---|---|---|---|
| Freezing | Pain gradually increases, sometimes with prominent night pain. | Movement becomes more limited as pain and stiffness build. | Discuss pain control and gentle, comfortable movement with a clinician. |
| Frozen | Pain may settle somewhat, but stiffness remains a major problem. | Reaching, rotating, and lifting the arm can be difficult. | Work on useful daily movement without forcing painful stretches. |
| Thawing | Pain and stiffness gradually ease for many people. | Movement slowly returns, though recovery can be uneven. | Build activity and mobility progressively, guided by symptoms. |
The first, or freezing, phase can be especially disruptive because pain may interfere with sleep and ordinary tasks. In the frozen phase, stiffness may be more noticeable than pain. During recovery, motion can return gradually, but progress may not be steady from week to week.
The overall course varies. Improvement may take many months and can take longer; there is no reliable timetable that fits everyone. Do not assume that persistent stiffness means you have damaged the joint further, but do get assessed if symptoms are severe, worsening, or not following a typical pattern.
What movements are usually hardest?
Frozen shoulder can limit several directions, but turning the upper arm outward is often particularly restricted. This movement is called external rotation. You use it when reaching behind your head, putting on a coat, or turning your arm outward to position your hand.
Other commonly difficult movements include lifting the arm to the side or above shoulder height, reaching behind your back, and bringing your hand across your body. The exact pattern differs. A clinician checks several directions rather than relying on one painful movement.
Daily tasks can reveal the limits more clearly than a simple pain score. You may struggle to reach a high shelf, put on a shirt, tuck in clothing, wash your back, or fasten a bra. Tell your clinician which tasks have changed; that information can help guide an examination and a treatment plan.
Why does frozen shoulder happen?
In frozen shoulder, the joint capsule becomes irritated and tight. The reason this process starts is not always clear. In some cases, it follows an injury, surgery, or another situation that keeps the shoulder still for a time. In others, symptoms begin without an obvious trigger.
People with diabetes have a higher likelihood of developing frozen shoulder, and the condition may be more persistent for them. Thyroid disorders are also associated with increased risk. These associations do not mean that everyone with one of these conditions will develop shoulder stiffness, or that a person without them cannot develop it.
Other shoulder problems can also cause pain and restricted movement. A rotator cuff injury affects tendons that help move and stabilize the shoulder. Arthritis can affect the joint surfaces. Neck problems may send pain toward the shoulder. Because these conditions can overlap in how they feel, symptoms alone cannot confirm the diagnosis.
How frozen shoulder is diagnosed
A clinician usually starts by asking when the symptoms began, whether there was an injury or operation, what movements are difficult, and whether pain interrupts sleep. They may ask about diabetes, thyroid disease, and other health conditions because these details can affect risk and care.
During the physical examination, the clinician compares both shoulders and checks how far you can move your arm. They may also move it for you. Restricted movement in both situations, especially a clear loss of outward rotation, can support a frozen shoulder diagnosis. The examination also helps identify signs that point to a different problem.
Imaging is not always needed to identify frozen shoulder. An X-ray may be used to check for arthritis or another bone-related cause of stiffness. Ultrasound or MRI may be considered when the examination suggests a tendon injury or another condition. These tests help rule in or rule out other explanations; a scan alone does not replace a clinical assessment.
Treatment options and what they are for
Treatment aims to control pain, preserve useful movement, and help you return to daily activities. The right approach depends on the phase of symptoms, how much movement is lost, your health, and your priorities. A clinician or physical therapist can help set a plan that does not provoke unnecessary pain.
| Option | What it may help with | Best suited to |
|---|---|---|
| Activity changes and gentle movement | Maintaining comfortable use of the shoulder without repeated aggravation. | Most people as a basic part of care. |
| Physical therapy | Guided mobility and gradual return to useful movement. | People who need help choosing safe exercises or tracking progress. |
| Pain medicine | Reducing pain enough to support sleep and daily activity. | People whose symptoms interfere with function, after checking safety. |
| Corticosteroid injection | Reducing inflammation and pain for some people, particularly earlier in the condition. | People whose pain remains difficult to manage; a clinician weighs benefits and risks. |
| Other procedures | Helping address persistent, substantial stiffness in selected cases. | People who have not improved enough with nonsurgical care and need specialist advice. |
Movement and physical therapy
Gentle movement can help you maintain function, but forceful stretching is not a shortcut. Pushing hard into sharp pain may make the shoulder more irritated and can make it harder to keep moving comfortably. Exercises should match your current pain and stiffness, then progress as tolerated.
A physical therapist may teach guided range-of-motion exercises and help you adjust them over time. The goal is not to force the arm to normal movement in one session. Consistent, manageable practice is more useful than occasional intense stretching.
Pain relief and injections
Over-the-counter pain medicines, including acetaminophen or anti-inflammatory medicines, may help some people. They are not suitable for everyone. Health conditions, pregnancy, allergies, and other medications can change what is safe, so ask a clinician or pharmacist before using them, especially for more than a short period.
A corticosteroid injection may be discussed when pain is limiting sleep or movement. It can reduce symptoms for some people, but it does not instantly restore normal movement, and its suitability depends on individual circumstances. Ask what benefit to expect, what risks apply, and whether exercise or therapy should accompany it.
For persistent, major stiffness, a specialist may discuss procedures such as hydrodilatation, manipulation under anesthesia, or arthroscopic capsular release. Hydrodilatation involves injecting fluid into the joint to stretch the capsule. Manipulation and surgery are generally considered selectively when other care has not helped enough; they are not routine first steps.
What you can do at home without aggravating your shoulder
- Keep the arm gently active. Use comfortable movements in ordinary tasks rather than keeping the shoulder completely still. If a movement causes sharp or lasting pain, reduce its range or pause it.
- Adjust tasks temporarily. Move frequently used items to a lower shelf, use the other arm for heavier tasks when practical, and avoid repeated overhead reaching if it sharply increases symptoms.
- Support sleep. Try lying on your back or the unaffected side. A pillow under the affected arm may make it more comfortable. Avoid pressure directly on the painful shoulder if that worsens symptoms.
- Track function, not just pain. Note whether dressing, reaching, or sleep is getting easier. Small functional changes can be easier to recognize than day-to-day changes in stiffness.
- Arrange assessment when needed. Seek a clinician’s advice if pain or restricted movement is interfering with daily life, if symptoms are worsening, or if you are unsure whether another condition is involved.
A useful point that is easy to miss: complete rest is not usually the answer. Avoiding every movement can add to stiffness, while forcing painful stretches can aggravate symptoms. Aim for comfortable, regular movement and get tailored advice if you cannot find a tolerable range.
When shoulder pain needs prompt medical attention
Arrange a medical assessment for ongoing shoulder pain and stiffness, especially if you cannot raise your arm or manage ordinary tasks. Get prompt care after a significant injury, if the shoulder looks deformed, or if you develop a hot, red shoulder with fever. These symptoms can point to a problem that needs different or urgent treatment.
Seek emergency help if shoulder pain occurs with chest pressure, shortness of breath, faintness, or other concerning symptoms. Shoulder pain is not always caused by the shoulder joint itself. Sudden arm weakness or numbness also deserves prompt assessment.
Common questions about frozen shoulder
Is frozen shoulder the same as a rotator cuff tear?
No. Frozen shoulder mainly restricts the joint’s movement because the capsule is tight. A rotator cuff tear affects tendons and may cause weakness or pain when lifting the arm. The conditions can feel similar, and a clinician can assess which explanation fits.
Can frozen shoulder get better on its own?
Many people improve over time, but recovery can be slow and incomplete for some. Appropriate pain management and guided movement can help you maintain function while symptoms change. A clinician can discuss whether additional treatment makes sense for your situation.
Should you stretch through the pain?
No. Mild discomfort during a prescribed movement may be acceptable, but sharp pain or a flare that lasts afterward is a reason to ease off and ask for guidance. More force does not necessarily mean faster recovery.
Can frozen shoulder affect the other shoulder?
It can occur in the other shoulder, either at another time or, less commonly, alongside symptoms in the first. If the other shoulder becomes painful and stiff, seek an assessment rather than assuming the cause is the same.
Does a scan confirm frozen shoulder?
Not by itself. The diagnosis is often based on your history and the pattern of restricted movement. Imaging may help check for other causes when the examination suggests it is needed.
Frozen shoulder is a painful tightening of the tissue around the shoulder joint. Its hallmark is restricted movement, often alongside aching that can disturb sleep; symptoms and recovery time vary from person to person.
If you are asking what is frozen shoulder and what are the symptoms because your shoulder is becoming stiff, arrange an assessment rather than forcing painful stretches. In the meantime, keep movement gentle and comfortable, and ask a clinician or pharmacist which pain relief options are safe for you.