Complex Regional Pain Syndrome (CRPS) is a chronic pain condition that can be challenging to recognise, particularly in its early stages. It often develops after an injury, surgery or fracture, yet the pain experienced may be far more severe and long-lasting than expected from the original event. Because its symptoms can resemble those of other musculoskeletal or neurological conditions, CRPS may be overlooked or mistaken for another diagnosis.
Seeking an early assessment from a pain specialist Singapore can help improve the chances of timely treatment, which may support better pain control and functional recovery. A pain specialist in Singapore can perform a thorough evaluation, assess your symptoms, rule out other possible causes of pain and develop an individualised treatment plan based on your condition.
What Is Complex Regional Pain Syndrome (CRPS)?
Complex Regional Pain Syndrome (CRPS) is a chronic pain condition that usually affects one limb, such as an arm, hand, leg or foot. It often develops after an injury, surgery, fracture or other form of trauma, although the pain and other symptoms are typically much more severe than would normally be expected from the initial event. While the exact cause of CRPS is not fully understood, it is thought to involve abnormal responses of the nervous system and inflammation, causing the body to continue sending pain signals even after the original injury has started to heal.
CRPS is generally classified into two types. CRPS Type I occurs without evidence of a confirmed nerve injury and is the more common form. CRPS Type II, previously known as causalgia, develops following a confirmed injury to a specific nerve. Although both types share similar symptoms and are managed in similar ways, identifying the underlying cause helps guide the overall assessment.
Recognising The Symptoms Of CRPS
The symptoms of Complex Regional Pain Syndrome (CRPS) can vary from person to person and may change as the condition progresses. In many cases, the earliest sign is persistent pain that continues long after the original injury would normally have healed. The pain is often described as burning, throbbing or aching and may be significantly more intense than expected for the initial injury.
Other symptoms can affect the skin, muscles and joints of the affected limb. These may include:
- Severe, persistent pain that is disproportionate to the original injury
- Increased sensitivity to touch, pressure or temperature
- Swelling in the affected area
- Changes in skin colour, which may appear red, blue or pale
- Skin that feels warmer or cooler than the surrounding areas
- Shiny, thin or unusually sweaty skin
- Stiffness and reduced range of motion in nearby joints
- Muscle weakness, tremors or involuntary muscle spasms
- Changes in hair or nail growth
Because these symptoms overlap with conditions such as nerve injuries, arthritis, infections or circulation problems, CRPS is not always immediately recognised.
How A Pain Specialist Singapore Diagnoses CRPS
Diagnosing Complex Regional Pain Syndrome (CRPS) can be challenging because there is no single blood test, scan or imaging study that can confirm the condition. Instead, a diagnosis is made through a comprehensive clinical assessment that considers your medical history, symptoms and physical examination findings.
A pain specialist will typically begin by gathering detailed information about your condition, including:
- When your symptoms first began
- Whether the symptoms developed after an injury, surgery, fracture or other trauma
- The nature, severity and progression of your pain
- Any swelling, skin colour or temperature changes
- Sensitivity to touch, pressure or temperature
- Difficulty moving the affected limb or performing daily activities
- Previous treatments and how your symptoms have responded
A physical examination is then performed to look for signs that may be consistent with CRPS. This may include assessing:
- Swelling in the affected limb
- Differences in skin colour or temperature compared with the opposite limb
- Changes in skin texture or sweating
- Pain response to light touch or gentle movement
- Joint stiffness and range of motion
- Muscle weakness, tremors or other movement abnormalities
Many pain specialists also use the Budapest Criteria, an internationally recognised set of clinical criteria for diagnosing CRPS. These criteria require the presence of specific symptoms reported by the patient together with physical signs observed during the examination, while also ensuring that another medical condition does not better explain the symptoms.
Tests That May Be Used To Rule Out Other Conditions
Although CRPS is primarily diagnosed through a clinical assessment, a pain specialist may recommend additional tests to rule out other conditions that can cause similar symptoms. Depending on your symptoms and medical history, the following tests may be considered:
- X-rays: To identify fractures, bone changes or joint abnormalities.
- Magnetic Resonance Imaging (MRI): To evaluate soft tissues, bones and joints, and to detect injuries or conditions that may be contributing to your symptoms.
- Bone Scan: In some cases, a bone scan may reveal changes in bone metabolism that can support the overall clinical assessment, particularly during the early stages of CRPS.
- Nerve Conduction Studies And Electromyography (EMG): These tests assess nerve and muscle function and may help identify nerve injuries or other neurological conditions.
- Blood Tests: These may be performed to rule out infections, inflammatory diseases or other medical conditions that could produce similar symptoms.
The need for these investigations varies from person to person. A pain specialist will recommend only those that are appropriate based on your symptoms and examination findings.
When Should You See A Pain Specialist Singapore?
You should consider seeing a pain specialist Singapore if pain persists beyond the expected healing period or becomes increasingly severe after an injury, surgery or fracture. While some discomfort is a normal part of recovery, symptoms that appear disproportionate to the original injury should not be ignored. Signs that warrant a medical assessment include:
- Severe or persistent pain that does not improve
- Burning, throbbing or stabbing pain in a limb
- Swelling that continues or worsens over time
- Changes in skin colour, temperature or texture
- Extreme sensitivity to touch or temperature
- Stiffness or difficulty moving the affected limb
- Pain that interferes with work, sleep or daily activities
Conclusion
Complex Regional Pain Syndrome (CRPS) can be difficult to recognise, particularly in its early stages, as its symptoms often resemble those of other conditions. A thorough clinical assessment is essential to identify the underlying cause of persistent pain and rule out other possible diagnoses.
If you are experiencing persistent pain after an injury, surgery or fracture and would like an assessment, contact our clinic, at:
Total Pain Specialist Clinic
Farrer Park Station Rd, #10-10 Farrer Park Medical Centre, Singapore 217562
Phone: +65 8908 1406
