Frozen Shoulder: Phases, Causes, and Treatment Methods

Frozen shoulder can gradually make even simple everyday movements painful and difficult. Reaching for a high shelf, putting on a jacket, or lying on the affected side may begin to hurt, while the shoulder becomes increasingly stiff over the following weeks and months.

Recovery takes time, but proper care can help most people regain mobility and return to everyday activities. Treatment should be adapted to the current phase, allowing the shoulder to remain active without repeatedly aggravating it. Understanding these phases can help you manage the condition and know what to expect during recovery.

What Is a Frozen Shoulder?

Frozen shoulder, medically known as adhesive capsulitis, is a condition in which the shoulder joint capsule progressively thickens and tightens, restricting movement. As the condition progresses, the capsule can contract, leaving less room for the shoulder to move normally.

The defining feature of frozen shoulder is a loss of both active and passive movement. This means that you cannot move the arm freely yourself, and the shoulder remains restricted even when someone else gently moves it while you relax. Turning the arm outward, known as external rotation, is often particularly limited. 

Symptoms of Frozen Shoulder

Pain is usually the main symptom during the early stage of frozen shoulder. It may become more intense at night and significantly disrupt your sleep. Stiffness often becomes more noticeable as the pain begins to ease. Everyday activities such as washing your hair, getting dressed, fastening a seatbelt, or reaching behind your back may remain difficult even when the shoulder is less painful.

A medical or physiotherapy assessment is recommended when shoulder pain and loss of movement gradually worsen over time. An assessment can help determine whether the characteristic movement restrictions are caused by frozen shoulder or another shoulder condition.

Some symptoms require prompt medical attention. See a doctor immediately if you develop significant weakness or numbness in your arm, as these can point to other serious conditions.

Causes and Risk Factors of Frozen Shoulder

Frozen shoulder can develop either without an identifiable cause or in connection with another problem. When there is no clear trigger, it is known as primary or idiopathic frozen shoulder. Secondary frozen shoulder may develop after an injury or surgery, or following a long period in which the arm has remained relatively still.

Certain health conditions increase the likelihood of developing frozen shoulder. Diabetes and thyroid disorders are among the most common risk factors, and in these cases the condition may also be more persistent and slower to improve.

Frozen shoulder affects an estimated 2 to 5 percent of the general population. It most commonly develops between the ages of 40 and 60 and affects women more often than men. In many cases, only one shoulder is affected at first, with around one in three patients experiencing symptoms in both shoulders.

The Three Phases of Frozen Shoulder

Frozen shoulder typically progresses through three phases: freezing, frozen, and thawing. The length of each phase varies from person to person, and the entire course can last from several months to a few years. 

Phase 1: Freezing

The freezing phase is mainly marked by increasing pain and a gradual loss of movement. The pain is often most intense at night, while the shoulder becomes progressively more difficult to move. This phase usually lasts around two to nine months. Movement should remain gentle and controlled, since forcing movement beyond what feels comfortable tends to aggravate the pain.

Phase 2: Frozen

During the frozen phase, stiffness usually becomes the main problem as the pain begins to ease. Lifting the arm and turning it outward often remain particularly difficult. This phase commonly lasts between four and twelve months. Because movement is still restricted, you may need to adapt activities such as getting dressed, managing personal care, or working above shoulder height. 

Phase 3: Thawing

The thawing phase is characterized by a gradual return of shoulder movement and function. Pain becomes less frequent, and using the arm for everyday activities slowly becomes easier. This stage can last from five to twenty-four months. As movement returns, exercise can gradually progress to rebuild mobility, strength, and load tolerance.

How Is Frozen Shoulder Treated? 

Frozen shoulder treatment changes as the condition progresses. Early care focuses on managing pain, while later treatment works to restore movement, strength, and everyday function.

Pain Relief and Other Medical Treatments 

A doctor may recommend medications to ease pain and swelling, such as NSAIDs. For more severe pain, a corticosteroid injection into the shoulder joint can help reduce pain and improve movement.

Surgery is considered only when severe restriction persists despite conservative treatment. Options include manipulation under anaesthesia and capsular release, but these surgeries are usually reserved for cases that do not respond to other treatment.

How Physiotherapy Helps with Frozen Shoulder 

Physiotherapy helps you regain movement without unnecessarily aggravating the shoulder. Treatment may include gentle stretching, comfortable strength exercises, practical posture advice for daily activities, and controlled manual therapy. As the shoulder improves, exercises gradually become more active to rebuild mobility, strength, coordination, and load tolerance.

A personalised home-exercise programme supports your progress between appointments. Your physiotherapist will adjust the movements and intensity according to how your shoulder responds, helping you avoid both excessive caution and overloading the joint. 

How Long Does Frozen Shoulder Last?

Recovery from frozen shoulder usually takes between 12 and 36 months, although the condition can sometimes last longer. The exact duration varies depending on the person, the severity of the restriction, and how the shoulder progresses through each phase.

Regain Your Shoulder Movement with PhysioWelt

Frozen shoulder requires patience, but the right support can make the recovery process more manageable. Because the condition changes as it progresses, treatment should be regularly adapted to your current level of pain, stiffness, and function.

At PhysioWelt in Schlieren, our physiotherapists assess how your shoulder moves, identify which phase you are likely experiencing, and tailor your treatment accordingly. Early treatment focuses on easing pain and maintaining comfortable movement, while later rehabilitation helps you restore mobility, strength, and confidence in using your arm.

If your shoulder pain is not improving or your movement is becoming increasingly restricted, book an appointment with us. We will help you understand what is happening and guide you through each stage of your recovery.

Frequently Asked Questions (FAQ)

Can frozen shoulder heal without treatment? 

Frozen shoulder often improves over time, even without surgery. However, recovery can take several months or years. Appropriate treatment can help manage pain, maintain or restore movement, and make everyday activities easier throughout the recovery process. 

What is the connection between frozen shoulder and diabetes? 

Diabetes is a well-established risk factor for frozen shoulder. The condition is more common in people with diabetes and may cause more severe stiffness or take longer to improve. Good diabetes management remains important, although it does not guarantee that frozen shoulder will be prevented. 

Should you rest a frozen shoulder or keep it moving? 

Complete rest is generally not recommended for frozen shoulder. Instead, the shoulder should be moved according to the current phase and its response to activity. During the painful early phase, movement should remain gentle and within a comfortable or only mildly challenging range. As the pain settles, exercise can become more active. Medical Training Therapy may then support the structured rebuilding of mobility and strength. 

Can frozen shoulder return after treatment? 

Frozen shoulder can return, especially after surgery if physiotherapy is not continued. To help maintain the restored range of motion, patients should continue their exercises at home or, preferably, with a physiotherapist for several weeks or even months, depending on their condition.