Complex regional pain syndrome (CRPS) can cause lasting pain and changes in an arm or leg, often after an injury. Symptoms and recovery vary from person to person.
Does CRPS progress through fixed stages?
The familiar three-stage description of CRPS is not a proven sequence. The 2022 CRPS diagnostic and treatment guideline explains that research does not support the historical progression from “acute” to “dystrophic” to “atrophic” stages. A numbered stage should not be used to predict an individual’s future symptoms.
Symptoms can change over time. A clinician should assess what you are experiencing now, including pain, movement and changes in the affected limb.
How are CRPS type I and type II different?
Types describe a distinction involving nerve injury, not successive stages. Type I, historically called reflex sympathetic dystrophy (RSD), occurs when a specific nerve injury has not been identified. Type II, historically called causalgia, follows a distinct nerve injury. Their symptoms can be similar. Mayo Clinic describes the two types.
What symptoms can occur?
CRPS may involve burning or stinging pain, unusual sensitivity to touch, swelling, and changes in skin color, temperature or sweating. Stiffness, difficulty moving the affected limb, and changes in hair or nails can also occur. The NHS symptom guide describes these features and possible complications. They are not a checklist for diagnosing yourself.
Persistent pain can also affect sleep and emotional wellbeing. Tell your care team about changes in daily activities as well as physical symptoms.
How is CRPS diagnosed?
There is no single test that confirms CRPS. A clinician reviews your history, examines you and considers other explanations for the symptoms. Tests may help rule out another condition. The NHS diagnosis guide explains that process.
The cause of CRPS is not fully understood. Cambridge University Hospitals notes that an injury usually triggers CRPS, but not always. If pain is persistent or interferes with everyday activities, seek medical assessment rather than waiting to identify a stage.
What can treatment and recovery involve?
There is currently no cure for CRPS, but treatment can help manage symptoms. Care may involve rehabilitation, pain management, education and psychological support. The NHS overview describes these approaches. A treatment plan should reflect the individual’s needs.
Some people improve over time; others have persistent pain or disability. A stage label cannot promise recovery or establish that improvement is impossible. Discuss your symptoms, goals and concerns with your care team.
What does “stage 4 CRPS” mean?
The guideline cited above does not establish a four-stage progression. Describing “stage 4” as an inevitable final phase can mislead readers about what their symptoms mean. Ask your clinician to explain your diagnosis and outlook in terms of your own condition.
Information about an accident-related claim
For information about the legal side of an accident-related injury, see GJEL’s California CRPS injury-claim page. This article provides general health information and does not replace medical assessment.