M89.012

Clinical Causes: Trauma or injury to the shoulder, such as fractures, sprains, or surgeries. Nerve damage or irritation during or after injury. Disruption of normal nerve signaling resulting in abnormal pain responses. In some cases, there is no clear preceding injury, which complicates diagnosis. Potential underlying issues like autoimmune responses or neurological dysregulation may also contribute.

Key Symptoms: Severe and persistent shoulder pain that may spread to nearby areas. Increased sensitivity to touch or temperature changes in the affected shoulder. Swelling and edema around the shoulder and arm. Changes in skin appearance, including redness, pale or bluish discoloration. Altered skin temperature, often feeling warmer or cooler than the unaffected side. Muscle atrophy or weakness due to decreased use or nerve involvement. Reduced range of motion and stiffness in the shoulder joint. Easily elicited pain in response to normally non-painful stimuli, known as allodynia.

Diagnosis Path: A thorough medical history and physical examination to assess pain, skin changes, and functional impairment. Imaging studies such as X-rays or MRI to exclude fractures, infections, or other structural issues. Bone scans or thermography to identify abnormal activity in the affected limb. Nerve conduction studies or electromyography to evaluate nerve function. Exclusion of other conditions that mimic CRPS symptoms, such as infections or vascular disorders.

Treatment Protocols: Medications such as pain relievers, corticosteroids, anticonvulsants, and antidepressants to manage pain. Physical therapy and occupational therapy to maintain mobility and prevent muscle atrophy. Nerve blocks or other interventional procedures for pain relief. Psychological support or counseling to address emotional impacts and improve coping strategies. Mirror therapy and graded motor imagery to retrain the brain’s response to pain. Sympathetic nerve blocks may be considered in certain cases. Emerging therapies such as neuromodulation or spinal cord stimulation for refractory cases.