After a broken wrist, a sprained ankle, or even minor surgery, most people expect pain to fade over weeks. But for some, the pain doesn’t just stick around-it gets worse. It starts as a dull ache and turns into a constant, searing burning pain that feels like glass under the skin. Even the lightest touch, a breeze, or a change in room temperature can send shockwaves through the limb. This isn’t normal healing. This is Complex Regional Pain Syndrome, or CRPS.

What Exactly Is CRPS?

CRPS is a neurological condition where the nervous system goes haywire after an injury. It’s not just pain. It’s pain that’s out of proportion to what happened. A simple fracture, a cut, or even a needle stick can trigger it. The pain doesn’t match the damage. It’s like your nerves are stuck on maximum volume, screaming even when there’s no real threat.

There are two types. Type I (about 90% of cases) happens without a clear nerve cut. Type II means a specific nerve was damaged. Both cause the same symptoms. It usually hits arms or legs, but it can spread. The pain is deep, constant, and often described as burning, stabbing, or electric. Many people say it feels like their limb is on fire from the inside.

Why Does It Happen?

No one knows exactly why some people get CRPS and others don’t. Even with the same injury, one person recovers, another spirals into chronic pain. But researchers have identified key players:

• Inflammation: In the early weeks, chemicals flood the injured area, making nerves hypersensitive. This isn’t just swelling-it’s nerve irritation.
• Nerve damage: Tiny sensory and autonomic nerve fibers get damaged. These are the ones that control pain signals, temperature, and sweat. When they’re hurt, they misfire.
• Sympathetic nervous system: This part of your nervous system handles fight-or-flight responses. In CRPS, it gets stuck in overdrive, amplifying pain signals instead of calming them.
• Brain changes: Over time, the brain starts rewiring itself to expect pain. It becomes more sensitive to any signal from the limb-even harmless ones.

Some studies suggest an autoimmune component. In about 30% of patients, the immune system mistakenly attacks nerve tissue, keeping inflammation alive long after the injury heals. This might explain why some cases get worse instead of better.

What Does It Feel Like?

CRPS doesn’t just hurt. It changes your body. Here’s what most people experience:

• Burning or throbbing pain: The signature symptom. It’s deep, constant, and often worse at night.
• Extreme sensitivity: Light brushing, a shirt sleeve, or even a fan blowing on your skin can cause sharp pain. This is called allodynia.
• Temperature changes: The affected limb might feel hotter or colder than the other. A difference of just 0.5°C to 1.5°C is common early on.
• Skin changes: Skin can turn blotchy, purple, red, or pale. It gets shiny, thin, and tight. Hair and nails may grow faster-or stop growing.
• Swelling and stiffness: Joints get stiff. Muscles spasm. You lose fine motor control-buttoning a shirt, typing, or holding a cup becomes hard.
• Tremors or spasms: Uncontrollable shaking or sudden muscle contractions can happen without warning.

These symptoms don’t always show up together. Some people have burning pain but no swelling. Others have stiff joints but mild pain. That’s why it’s often missed.

Who Gets CRPS?

It’s not random. Certain patterns show up:

• Gender: Women get CRPS about three times more often than men. Why? Hormones, immune differences, or pain perception may play a role-but no one knows for sure.
• Age: Most cases happen between 40 and 60. But teens and older adults can get it too.
• Trigger injuries: Fractures cause about 40% of cases. Wrist fractures are the most common. Surgery (like carpal tunnel repair), sprains, cuts, or even heart attacks can trigger it.
• Timing: Symptoms usually appear 4 to 6 weeks after the injury. But they can start in days-or months later.

Even weirder: some people get CRPS without any obvious injury. No trauma, no surgery, no accident. Just pain. That’s why doctors now say CRPS isn’t always triggered by injury-it can arise on its own.

How Is It Diagnosed?

There’s no blood test. No X-ray. No MRI that shows CRPS. Diagnosis is based on the Budapest Criteria, a set of clinical signs doctors look for:

1. Pain that’s ongoing and disproportionate to any initial injury.
2. Symptoms in at least two of these categories: sensory (like allodynia), vasomotor (temperature changes), sudomotor (sweating changes), or motor/trophic (weakness, hair/nail changes).
3. At least one sign in two or more categories during examination.
4. No other diagnosis explains the symptoms.

Early diagnosis is critical. If you wait too long, the nervous system locks into pain mode. The longer CRPS goes untreated, the harder it is to reverse.

Can It Go Away?

Some people recover fully-especially if treated early. Studies show that if you start treatment within the first 3 months, your chances of full recovery jump dramatically. But if it’s ignored for over a year, the pain often becomes permanent.

Many cases do improve on their own. But waiting for that to happen is risky. Without treatment, you risk permanent joint stiffness, muscle wasting, and emotional toll. Depression, anxiety, and sleep loss are common. The pain doesn’t just live in your limb-it lives in your life.

What Treatments Actually Work?

Treatment isn’t one-size-fits-all. It’s layered. The goal is to calm the nervous system, reduce inflammation, and retrain the brain.

• Physical therapy: This is the #1 first step. Gentle movement, stretching, and graded exposure to touch help your brain unlearn pain. Avoiding movement makes it worse.
• Medications: NSAIDs help in early stages. Corticosteroids reduce inflammation. Gabapentin or pregabalin calm overactive nerves. Antidepressants like amitriptyline can help with pain and sleep.
• Nerve blocks: Injecting numbing medicine near the sympathetic nerves can reset the system. If it works, it’s a sign CRPS is driven by nerve overactivity.
• Spinal cord stimulation: A small device sends mild electrical pulses to block pain signals. It’s for people who haven’t responded to other treatments.
• Psychological support: Chronic pain rewires your brain. Cognitive behavioral therapy (CBT) helps you manage fear, anxiety, and the emotional weight of living with constant pain.

Some newer treatments are being tested: ketamine infusions, immunotherapy, and advanced neuromodulation. These aren’t standard yet, but they’re showing promise in clinical trials.

What Doesn’t Work

Many people try things that sound logical-but backfire:

• Resting too much: Avoiding movement leads to stiffness and muscle loss. It tells your brain the limb is dangerous.
• Heavy painkillers: Opioids don’t work well for nerve pain. They carry addiction risks without fixing the root cause.
• Ignoring emotional health: Pain and stress feed each other. Therapy isn’t optional-it’s part of healing.

CRPS is not a mental illness. But ignoring your mental health makes it worse.

What to Do If You Suspect CRPS

If you had an injury and now have:

• Pain that’s burning and way worse than expected
• Skin changes, swelling, or temperature differences
• Sensitivity to touch or temperature
• Loss of movement or strength

Don’t wait. Go to a pain specialist or neurologist. Ask: “Could this be CRPS?” Bring a list of your symptoms and when they started. Early action makes all the difference.