Reflex sympathetic dystrophy (RSD), also known as complex regional pain syndrome (CRPS), is an incompletely understood response of the body to an external stimulus, resulting in pain that is usually nonanatomic and disproportionate to the inciting event or expected healing response. Look over the information below to learn more or click here to schedule your appointment.
What Causes RSD?
According to the National Institute of Neurological Disorders and Stroke (NINDS), RSD is “a chronic pain condition that is believed to be the result of dysfunction in the central or peripheral nervous systems.”
According to MedicineNet, RSD involves “irritation and abnormal excitation of nervous tissue, leading to abnormal impulses along nerves that affect blood vessels and skin.”
Animal studies indicate that norepinephrine, a catecholamine released from sympathetic nerves, acquires the capacity to activate pain pathways after tissue or nerve injury, resulting in RSD.
Another theory suggests RSD which follows an injury is caused by triggering an immune response and symptoms associated with inflammation (redness, warmth, swelling).
RSD is not thought to have a single cause, but rather multiple causes producing similar symptoms.
What Are The Symptoms Of RSD?
RSD usually affects one of the extremities (arms, legs, hands, or feet). The primary symptom of RSD is intense, continuous pain. According to NINDS, the list of symptoms includes:
- burning pain
- increased skin sensitivity
- skin temperature changes (warmer or cooler than opposing extremity)
- skin color changes (blotchy, purple, pale, red)
- skin texture changes (shiny, thin, sweaty)
- changes in nail and hair growth patterns
- stiffness and swelling in affected joints
- decreased ability to move affected extremity
Pain can spread to a wider area (i.e. from finger to entire arm) and can spread to the opposite extremity (i.e. from left arm to right arm). Emotional stress can cause symptoms to worsen.
Some experts suggest there are three stages of RSD, during which progressive changes occur in the skin, muscles, joints, ligaments, and bones of the affected area. The progression has not been confirmed by clinical studies though.
Stages Of RSD
- lasts 1 to 3 months
- severe, burning pain
- muscle spasm
- joint stiffness
- rapid hair growth
- skin color and temperature changes
- lasts from 3 to 6 months
- pain which becomes more intense
- decreased hair growth
- nails which are cracked, brittle, grooved, spotty
- softened bones
- stiff joints
- weak muscle tone
- irreversible changes to skin and bone
- pain is continuous
- muscle atrophy
- severe limited mobility
- contractions of muscles and tendons (limbs may be twisted)
What Triggers RSD?
There can be numerous triggers for RSD including:
- injury or trauma
- degenerative arthritis of the neck
- shoulder problems
- heart disease
- brain diseases
- thyroid disorders
- carpal tunnel
- certain medications
In an estimated one-third of patients with RSD, there is no associated trigger.
How Is RSD Diagnosed?
A patient’s clinical history (signs and symptoms) are the major factor in diagnosing RSD. The diagnosis is made difficult because many of the symptoms overlap with other conditions.
There is no specific blood test or other diagnostic test for RSD. X-rays can show thinning of bones (osteoporosis). Nuclear bone scans can show characteristic uptake patterns which help diagnose RSD.
How Is RSD Treated?
Treatment focuses on relieving painful symptoms associated with RSD. Treatment can include:
- physical therapy and exercise
- psychotherapy to relieve stress, anxiety, and depression
- sympathetic nerve blocks
- surgery including sympathectomy (considered controversial)
- spinal cord stimulation
- intrathecal drug pumps
- medications including:
- topical analgesics
- anti-seizure drugs
Celebrity Announces Battle With RSD
American Idol judge and celebrity Paula Abdul announced that following a 25 year battle with chronic pain, precipitated by a cheerleading accident when she was 17 years old, she has been diagnosed with RSD.
The media attention given to Abdul’s medical struggle has placed RSD on front pages and magazine covers. RSD is among the 100 types of arthritis and rheumatic diseases. It is estimated that between 500,000 and 750,000 people have RSD. Schedule your appointment now to treat and beat RSD.