When the cast comes off, but the pain stays

Distal radius fracture — the classic Colles fracture — is one of the most common fractures in adults. Bony consolidation occurs in 6 to 8 weeks and the immobilization is removed. However, for many patients, this is the beginning of a new problem: a stiff, painful wrist with functional loss that persists for months. Range of motion does not return, grip strength remains reduced, and simple activities such as turning a doorknob or opening a jar generate significant pain.

This post-immobilization syndrome results from muscle atrophy, fascial adhesions, joint stiffness, and trigger points in the forearm muscles that remained immobile for weeks. In more severe cases, it can evolve into complex regional pain syndrome (CRPS). Medical acupuncture acts on pain modulation, fascial release, and facilitation of rehabilitation — accelerating functional recovery when integrated into the rehabilitation program.

Mechanism of chronic post-immobilization pain

  1. Disuse muscle atrophy

    Weeks of immobilization cause significant atrophy of the wrist and finger flexor and extensor muscles. Muscle volume can decrease by up to 20% in 4 weeks of immobilization. Atrophied muscles are more susceptible to fatigue and trigger point activation when used in rehabilitation.

  2. Fascial and capsular adhesions

    Prolonged immobility allows the formation of adhesions between muscle fasciae, the joint capsule, and tendons. These adhesions restrict normal sliding of structures, generating stiffness and pain on movement. Loss of joint range is not only muscular — it is structural.

  3. Trigger points in the forearm

    Forearm muscles — especially the extensor carpi radialis, flexor carpi radialis, and pronator teres — develop trigger points during rehabilitation. The weakened musculature is recruited before being prepared, generating nodules of sustained contraction that refer pain to the wrist and hand.

  4. Peripheral and central sensitization

    Persistent pain sensitizes the nociceptive pathways in the dorsal horn of the spinal cord. Previously innocuous stimuli begin to be perceived as painful (allodynia). In severe cases, this sensitization evolves into CRPS — with autonomic alterations (color, temperature, sweating) and disproportionate pain.

Clinical data on post-fracture rehabilitation

Significant share
OF PATIENTS
with distal radius fracture maintain some degree of pain or stiffness in the wrist months after immobilization removal — even with conventional rehabilitation, according to observational clinical series
Minority
DEVELOP CRPS
after distal radius fracture — early diagnosis in the first months tends to influence prognosis, since the ideal therapeutic window is short
Additional gains
IN REHABILITATION
in range of motion and grip strength have been described when medical acupuncture is integrated into the conventional post-fracture rehabilitation program, in case series
6–12
MONTHS
is the average time to complete functional recovery after distal radius fracture — rehabilitation is a long process that requires persistence

Recognizing post-immobilization syndrome

Critérios clínicos
08 itens

Pain and stiffness after wrist fracture \u2014 typical pattern

  1. 01

    Wrist stiffness that limits flexion, extension, and rotation

  2. 02

    Pain when holding objects or rotating the wrist (turning a tap, doorknob)

  3. 03

    Reduced grip strength compared with the unaffected side

  4. 04

    Persistent pain months after radiographically confirmed consolidation

  5. 05

    Residual edema in the wrist and dorsum of the hand

  6. 06

    Tenderness on palpation in the forearm muscles

  7. 07

    Progressive difficulty in physical therapy from excessive pain on mobilization

  8. 08

    Skin of the affected wrist with different temperature or color (warning sign for CRPS)

Myths and facts about post-fracture pain

Myth vs. Fact

MYTH

If the bone has healed, the pain should be gone

FACT

Bony consolidation is only one stage of recovery. Muscles, fasciae, joint capsule, and nerves were affected by the fracture and the immobilization. Trigger points in the forearm muscles and fascial adhesions are common causes of persistent pain after complete consolidation. Soft tissue rehabilitation is as important as that of the bone.

MYTH

Post-immobilization stiffness resolves on its own with time

FACT

Without adequate intervention, fascial and capsular adhesions can become permanent. The ideal window for rehabilitation is in the first 3 months after immobilization removal. The longer the stiffness persists without treatment, the more difficult complete recovery of range of motion becomes.

MYTH

Forcing movement is necessary to recover range

FACT

Aggressive mobilization in a wrist with active trigger points and inflamed adhesions generates more pain and more muscular guarding — worsening the condition. The correct approach is first to control pain (with medical acupuncture and adequate analgesia), then release the adhesions, and only then progress mobilization. Forcing can aggravate central sensitization and precipitate CRPS.

Rehabilitation that respects pain

Treatment protocol

Assessment and CRPS screening
1st visit

Wrist examination: range of motion, grip strength, sensation. Application of Budapest criteria for CRPS screening. If CRPS is confirmed, immediate multidisciplinary treatment. If post-immobilization syndrome without CRPS, proceed with the myofascial protocol.

Pain control and myofascial release
Sessions 1–4

Dry needling of trigger points in the wrist extensors (lateral epicondyle), wrist flexors, and pronator teres. Periarticular electroacupuncture in the wrist (LI-5, TW-4, SI-5) for local analgesia. Objective: reduce pain to enable rehabilitation.

Facilitation of joint mobilization
Sessions 4–8

Pré-rehabilitation needling — medical acupuncture session immediately before physical therapy to maximize the analgesic window. Fascial release techniques with needle in the flexor and extensor retinacula when adhesions limit tendon sliding.

Strengthening and autonomy
Sessions 8–12

Progressive spacing of acupuncture sessions as pain decreases. Gradual strengthening program with light resisted exercises. Wrist and hand proprioception exercises. Guidance for self-management of residual pain.

Clinical pearl: the forgotten pronator teres

Frequently asked questions

FREQUENTLY ASKED QUESTIONS · 04

Frequently Asked Questions

Yes, it is common. Bony consolidation does not mean complete recovery of soft tissues. Atrophied muscles, fascial adhesions, and trigger points persist after immobilization removal. The good news is that these causes are treatable with medical acupuncture and adequate rehabilitation.

No — they are complementary therapies. Physical therapy is essential to recover range of motion, strength, and function. Medical acupuncture potentiates rehabilitation by controlling pain and releasing fascial adhesions, allowing the patient to participate more actively in physical therapy. The physician coordinates both approaches.

CRPS presents characteristic autonomic signs: difference in temperature and color between the two wrists, disproportionate edema, hypersensitivity to light touch (allodynia), and severe pain disproportionate to the stimulus. If you notice these alterations, seek immediate medical evaluation — early diagnosis is essential for effective treatment.

Functional recovery after distal radius fracture takes on average 6 to 12 months. With medical acupuncture integrated into rehabilitation, progression of range of motion and strength tends to be faster. Factors such as age, severity of the fracture, presence of surgical fixation, and time of immobilization influence individual prognosis.