Adhesive capsulitis, which many patients know as frozen shoulder, is a painful condition where the shoulder gradually becomes stiff and difficult to move. In my practice, I often see Bangladeshi patients who first think this is only a minor muscle pull, a sleeping-position problem, or ordinary shoulder pain. By the time they come for evaluation, they may already be struggling to comb their hair, reach a high shelf, fasten clothing, or sleep comfortably on one side.

I usually explain to my patients that adhesive capsulitis is not simply pain. It is a condition in which the shoulder capsule becomes inflamed, tight, and thickened, leading to loss of both active movement and passive movement. That means the shoulder is difficult to move even when someone else tries to help move it. Although many cases improve over time, recovery can be slow, and early, sensible treatment can make day-to-day life more manageable.

This article is for general education. It is not a personal diagnosis or an individual treatment plan.

What Is Adhesive Capsulitis?

Adhesive capsulitis is a condition of the shoulder joint in which the capsule around the joint becomes painful, stiff, and restricted. The common name “frozen shoulder” is useful because patients often describe the shoulder as if it has become locked or frozen.

When I evaluate patients with this problem, the main issue is not only pain but also a clear reduction in movement. Reaching overhead, putting the hand behind the back, wearing a shirt, lifting a bag, or even simple prayer and grooming movements may become difficult.

Why does it happen?

The exact cause is not always clear. In some patients, it develops without a single obvious injury. In others, it may start after:

• a period of shoulder pain that leads to reduced use
• minor trauma
• surgery
• fracture or prolonged immobilization
• diabetes
• thyroid disease

One important point I want Bangladeshi patients to understand is that frozen shoulder is more common in middle age, especially between 40 and 60 years, and it is seen more often in women. I am also more careful when a patient has diabetes, because these patients can develop more persistent stiffness and may recover more slowly.

Common Symptoms of Frozen Shoulder

The condition usually develops gradually. Patients often tell me the pain started first, then stiffness became the bigger problem.

Early symptoms

• dull or aching pain in the shoulder
• pain that becomes worse at night
• pain while reaching overhead or behind the back
• difficulty sleeping on the affected side

Later symptoms

• progressive stiffness
• trouble lifting the arm
• trouble wearing clothes, especially for women wearing blouse hooks or men tucking in a shirt
• difficulty with bathing, grooming, and household work
• pain with sudden shoulder movement

Unlike some other shoulder problems, adhesive capsulitis usually limits both active and passive range of motion. This is one of the clinical clues I use during examination.

Stages of Adhesive Capsulitis

Frozen shoulder often progresses in stages, although the timing varies from person to person.

1. Freezing stage

This is the painful stage. Pain gradually increases, especially at night and during movement. Shoulder motion begins to reduce. This stage may last weeks to months.

2. Frozen stage

Pain may reduce somewhat, but stiffness becomes much more obvious. Daily activities become difficult because the shoulder no longer moves normally.

3. Thawing stage

Movement slowly improves over time. Recovery can be prolonged, and in some patients it may take many months or even longer than a year. Some improve without surgery, but not everyone regains motion quickly.

Who Is More Likely to Get It?

In my practice, I pay particular attention to these risk factors:

• diabetes
• thyroid disorders
• age between 40 and 60 years
• recent shoulder injury or surgery
• long periods of reduced shoulder movement
• previous frozen shoulder on the other side

For Bangladeshi patients, one practical issue is delayed treatment after pain starts. Many people continue daily work, long commutes, household responsibilities, and stair use while avoiding shoulder movement because of pain. That avoidance can sometimes make stiffness worse.

How I Evaluate Adhesive Capsulitis

Adhesive capsulitis is mainly a clinical diagnosis. That means history and physical examination are very important.

What I look for during examination

• pain pattern
• night pain
• gradual stiffness
• loss of active range of motion
• loss of passive range of motion
• difficulty with external rotation and reaching behind the back

Are X-ray or MRI always needed?

Not always. I usually explain to my patients that X-rays may be useful to rule out other problems such as arthritis, fracture, or major bone-related issues. MRI is not required to diagnose every case of frozen shoulder, but it may be helpful when I need to exclude other conditions such as a rotator cuff tear or another source of shoulder pain.

In some patients, I may also consider blood sugar testing or thyroid assessment if the history suggests an underlying medical reason.

Conditions That Can Look Similar

Not every painful stiff shoulder is adhesive capsulitis. A proper evaluation is important because treatment may differ. Conditions that can mimic or overlap with frozen shoulder include:

• rotator cuff tear
• shoulder arthritis
• calcific tendinitis
• cervical spine-related pain
• recurrent dislocation or instability after injury