Understanding Frozen Shoulder
Adhesive capsulitis, commonly called frozen shoulder, occurs when the capsule surrounding the shoulder joint becomes thickened, inflamed, and tight, causing progressive pain and a significant loss of motion, both when you move the arm yourself and when someone else moves it for you. It typically progresses through three phases and, while it can take a year or more to fully resolve, most people improve substantially with treatment.
Causes
Frozen shoulder can develop from several causes, though it's often unclear why it starts:
Idiopathic (unknown cause), the most common scenario.
Diabetes, which significantly increases risk.
Prolonged immobilization of the shoulder after an injury or surgery.
Thyroid disease.
Inflammatory thickening and tightening of the joint capsule.
Symptoms
Frozen shoulder typically progresses through three phases, though the timeline varies from person to person:
Freezing phase: gradually worsening pain and progressive stiffness, often lasting several months.
Frozen phase: pain may lessen somewhat, but stiffness and restricted motion remain significant.
Thawing phase: motion gradually returns over months.
Throughout: diffuse, deep, aching shoulder pain, often worse at night.
Difficulty with basic tasks like reaching overhead, behind your back, or out to the side.
Seek prompt medical care if: Shoulder pain follows a fall or injury with sudden inability to lift the arm, or comes with fever, redness, and warmth over the joint. Left shoulder or arm pain with chest pressure, shortness of breath, or sweating needs emergency care.
Imaging Studies to Consider
Frozen shoulder is primarily a clinical diagnosis, but imaging can help rule out other causes:
X-ray of the shoulder rules out arthritis or other bony causes of stiffness.
MRI or ultrasound can show thickening of the joint capsule, though not always necessary for diagnosis.
Physical Therapy, Home Exercise & Other Conservative Techniques
A consistent stretching and physical therapy program is one of the most evidence-supported treatments for frozen shoulder and is typically the foundation of care:
Physical Therapy
A supervised stretching program tailored to your current stage (freezing, frozen, or thawing).
Joint mobilization techniques to improve range of motion.
Heat applied before stretching to improve tissue flexibility.
Home Exercise Program
Pendulum exercises.
Wall climbs ("finger walks") to gradually improve overhead reach.
Towel stretch, cross-body stretch, and sleeper stretch, done daily.
Other Studied Techniques
Consistency matters: regular home stretching is strongly linked to better long-term range of motion.
Heat before stretching, ice afterward if soreness develops.
Activity modification during the most painful (freezing) stage.
Interventional Treatment Options
Interventional treatments can meaningfully speed recovery, especially early in the course:
Intra-articular corticosteroid injection: Particularly effective in the early, painful "freezing" phase to reduce inflammation and pain.
Hydrodilatation (distension arthrography): A procedure where sterile fluid is injected into the tight joint capsule to gently stretch and expand it, often combined with steroid; a technique specifically effective for frozen shoulder.
Suprascapular nerve block: Reduces shoulder pain and can facilitate more effective physical therapy participation.
Platelet-rich plasma (PRP) injection: One of the better-supported shoulder uses of PRP in the broader literature. A network meta-analysis found intra-articular PRP improved both pain and function compared with physical therapy alone at 12 weeks, and was the only treatment studied that improved range of motion beyond physical therapy. It appears most effective in the early, painful "freezing" stage, typically given as a single injection or short series.
Acupuncture: A technique that may help improve pain and function during recovery.
Referral for manipulation under anesthesia or arthroscopic capsular release: Considered for cases that remain significantly limited despite extensive conservative and interventional treatment.
Neuromodulation: Spinal Cord & Peripheral Nerve Stimulation
For chronic pain that persists despite the treatments above, neuromodulation is an option:
Peripheral nerve stimulation (PNS) of the suprascapular nerve: Can help manage chronic shoulder pain, especially when combined with an active physical therapy program.
How Strong Is the Evidence?
A summary of the evidence supporting key treatments for adhesive capsulitis (frozen shoulder):
How to read this: Strong means consistent results from multiple high-quality studies. Moderate means generally favorable results with some limitations. Mixed or early means results so far are inconsistent or still emerging. Limited means few or lower-quality studies; these options can still be considered in select cases following a discussion with your healthcare provider.
Intra-articular corticosteroid injection: Strong evidence.
Hydrodilatation (distension arthrography): Moderate evidence.
Suprascapular nerve block: Moderate evidence.
Acupuncture: Moderate evidence.
Platelet-rich plasma (PRP): Promising early evidence.
Evidence reviewed November 2026. These ratings summarize published research and major medical society guidelines available at that time. Research continues to evolve, and we will go over the most current evidence for your situation at your visit.
Pain Psychology Techniques
Because frozen shoulder can take a year or more to fully resolve, pain psychology support helps you stay engaged with treatment and manage the frustration of a slow recovery:
Cognitive behavioral therapy (CBT) for pain helps manage the emotional toll of a prolonged recovery.
Pain neuroscience education: understanding the phases of frozen shoulder builds realistic expectations.
Graded activity pacing supports steady progress through physical therapy.
Relaxation training and diaphragmatic breathing.
Non-Opioid Medication Options
Non-opioid medications can help manage pain, especially during the freezing phase:
Anti-inflammatory and analgesic options
NSAIDs like ibuprofen or naproxen can reduce inflammation and pain.
A short oral steroid taper is sometimes used during the early, most painful phase.
Acetaminophen for additional pain relief.
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Talk With Us About Your Options
Call 650-507-4113 or send us a message to schedule a consultation at our Daly City, Los Altos, or Stockton office. We will review what may be causing your pain and walk through the risks, benefits, and alternatives of each option with you.
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This information is provided for general patient education and does not replace individualized medical advice. Please discuss your specific symptoms, diagnosis, and treatment options with your pain management physician.
