Frozen hip is an uncommon but important cause of persistent hip pain and stiffness. Medically, it’s known as adhesive capsulitis of the hip, and it’s similar to frozen shoulder. In a frozen hip, the joint capsule becomes inflamed, thickened, and tight, leading to progressive loss of movement and increasing pain. Although less common than frozen shoulder, frozen hip is likely underdiagnosed because its symptoms often mimic hip arthritis, a labral tear, or referred pain from the spine. Early recognition is essential, as targeted treatment can significantly shorten recovery.
What is a frozen hip?
Adhesive capsulitis of the hip occurs when the joint capsule becomes inflamed, thickened, and contracted. This progressively restricts hip movement and increases pain. It can develop without a clear cause (primary adhesive capsulitis) or after injury, surgery, or prolonged immobilisation (secondary adhesive capsulitis).
It’s more common in middle-aged adults and may be associated with conditions such as diabetes, thyroid disease, or inflammatory disorders.
Symptoms of a frozen hip
The most prominent symptoms are pain and stiffness that gradually worsen. The pain is usually deep in the groin or buttock and may radiate into the thigh. Many people describe difficulty with everyday activities such as putting on shoes, getting in and out of a car, or walking longer distances.
Stiffness is a defining feature. People often notice a progressive loss of hip movement, particularly rotation. Pain is usually worse at night and can disturb sleep. Unlike a muscle injury, the symptoms don’t improve with rest alone and can persist for months if untreated. One common complaint is being unable to sit cross-legged.
How is a frozen hip diagnosed?
The diagnosis of adhesive capsulitis of the hip is primarily clinical. On examination, there’s a global reduction in both active and passive hip movement. Internal rotation is typically the most restricted, followed by flexion and abduction.
Crucially, movement is limited even when the examiner moves the hip, which helps distinguish adhesive capsulitis from a muscle or tendon problem. Strength is usually preserved, though pain may limit effort.
A careful history is essential to exclude other causes of hip pain, such as osteoarthritis, a labral tear, or referred pain from the lumbar spine.
Imaging and investigations for a frozen hip
Imaging is used primarily to exclude other diagnoses rather than to confirm adhesive capsulitis directly.
Plain X-rays are usually normal and help exclude significant arthritis or structural problems. MRI may show capsular thickening, reduced joint volume, and inflammatory changes around the hip capsule. Ultrasound assesses the surrounding soft tissues and guides diagnostic or therapeutic injections. Blood tests aren’t routinely needed, but may help if inflammatory arthritis or infection is suspected.
Treatment of a frozen hip
Treatment focuses on controlling pain, restoring movement, and preventing long-term stiffness. In the early, painful phase, activity modification and simple pain relief help symptoms settle.
Physiotherapy plays a central role. Gentle, progressive stretching and mobility exercises improve the range of movement without aggravating pain — overly aggressive therapy early on can worsen symptoms and should be avoided.
Ultrasound-guided intra-articular hip injections with corticosteroid can be very effective, particularly when pain is the dominant symptom. These reduce inflammation in the joint capsule and often allow people to engage more effectively in rehabilitation. In selected cases, hydrodistension (stretching the tight capsule with fluid under imaging guidance) may be considered — a recent study found that a hydrodistension with 25 ml of fluid was effective for treating frozen hip.
Surgery is rarely required and is reserved for severe, resistant cases.
Recovery is often gradual. Symptoms may improve over several months, and patience is required, but most people eventually regain good function with the right management.
Frozen hip vs hip arthritis vs labral tear
| Feature | Adhesive capsulitis of the hip (Frozen hip) | Hip osteoarthritis | Hip labral tear / FAI |
|---|---|---|---|
| Typical feature | gradual, progressive | gradual, often years | often activity-related |
| Symptoms | Stiffness and pain | pain and reduced function | sharp catching pain |
| Stiffness pattern | global stiffness | internal rotation initially | ROM usually normal |
| Night pain | common | it can occur at end-stage | not common |
| Exam finding | marked loss of passive range of motion in multiple directions | reduced passive ROM especially in internal rotation | positive hip impingement signs |
| X-ray | Normal | Hip osteoarthritis | CAM morphology |
| MRI | May show capsular thickening/effusion; often used to exclude other causes | Cartilage loss, bone marrow change, synovitis | Labral tear and CAM morphology |
| First-line treatment | Activity modification, pain control, physio for mobility, consider injection. | Load management, physio, weight management, analgesia, injection | Activity modification, physio for hip control, consider injection |
| Role of injection | Often helpful to reduce pain/inflammation and enable rehab | Helpful for symptom relief | Can help confirm the intra-articular pain source and reduce symptoms |
| Expected course | Improves over months with a correct plan | Often progressive over time | Variable; may persist if structural impingement dominates |
Frequently asked questions about a frozen hip
What is adhesive capsulitis of the hip?
Adhesive capsulitis of the hip — sometimes called frozen hip — is a condition where the hip joint capsule becomes inflamed, thickened, and tight. This causes pain and a progressive loss of hip movement.
How is it different from hip arthritis?
Hip arthritis usually shows clear changes on X-ray and causes pain mainly with weight-bearing. Frozen hip often has a normal X-ray but causes marked stiffness in all directions — especially rotation — even when someone else moves the hip.
What does a frozen hip feel like?
Most people feel a deep ache in the groin or buttock, with increased stiffness and difficulty with daily activities such as putting on socks, getting out of a car, or walking longer distances. Pain often worsens at night.
How long does a frozen hip last?
It varies, but recovery typically takes several months. Early diagnosis, appropriate physiotherapy, and targeted treatments, such as an ultrasound-guided injection, can significantly shorten recovery time and improve comfort along the way.
Who gets a frozen hip?
It’s most common in middle-aged adults, and is more likely in people with diabetes, thyroid disease, or inflammatory conditions. It can also follow hip injury, surgery, or a period of immobilisation.
Does adhesive capsulitis of the hip go away?
Yes — in most cases, symptoms improve over time, though recovery can take several months. Early diagnosis, physiotherapy, and targeted treatment can meaningfully speed things up.
What treatments help the most?
Physiotherapy and carefully guided exercises are essential. In many cases, an ultrasound-guided hip injection reduces inflammation and pain, allowing movement to improve more quickly.
Final word from Sport Doctor London about frozen hip
Adhesive capsulitis of the hip is an under-recognised cause of chronic hip pain and stiffness. Because it can mimic many other hip conditions, early expert assessment is key to avoiding unnecessary investigations and prolonged symptoms. We emphasise accurate clinical diagnosis, targeted imaging, and evidence-based treatments such as ultrasound-guided injections and tailored rehabilitation. With the right approach, most people with a frozen hip can expect meaningful pain relief and a gradual return to normal movement.
If you have persistent hip pain and stiffness, Dr Masci can assess you in London, including an ultrasound in the clinic. Contact the team here or call +44 (0) 203 488 0350.
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