Meralgia paresthetica refers to a nerve entrapment syndrome characterized by numbness, burning discomfort and tingling along the thigh’s outer front. It arises when the lateral femoral cutaneous nerve (LFCN), responsible for providing sensation to the skin above the thigh, becomes trapped or compressed as it passes through the front of the pelvis.
Symptoms
The primary symptoms associated with meralgia paresthetica involve:
Pain or burning sensation on the outer thigh that may radiate to the outer knee.
Numbness above the outer thigh.
Increased sensitivity to slight touch over the outer thigh.
Symptoms that worsen in particular positions.
Occasional discomfort in the groin area.
Discomfort across the buttocks.
Many individuals with this condition notice that symptoms develop or get worse after prolonged walking or standing.
Causes and Risk Factors
Age: The likelihood of developing the condition rises, especially after age 50.
Sex: Women are at a higher risk compared to men.
Repeated thigh movements: Activities such as cycling, running, or prolonged sitting can contribute to meralgia paresthetica.
Obesity or weight gain: Too much weight can exert pressure on the lateral femoral cutaneous nerve and increase the likelihood of compression. Meralgia paresthetica is usually common in those who gain weight quickly, wear tight, restrictive trousers, or wear a tight belt that may press against the nerve as it leaves the front of the pelvis.
Pregnancy: Pregnancy-related hormonal changes can contribute to meralgia paresthetica.
Diagnosis
At The Joint Pain Clinic, we often diagnose meralgia paresthetica using a combination of these methods:
Physical examination: The physician will closely inspect the thigh for localized tenderness or pain. Several tests may be conducted to evaluate the spread of sensory symptoms and rule out other potential reasons for thigh pain; these include hip osteoarthritis and nerve pain originating from the lumbar spine.
Medical history: The physician will ask about your symptoms, past thigh injuries, activities, and any disorders that might be causing nerve compression.
Imaging tests: The doctor may use ultrasound or MRI to rule out possible causes, such as anomalies in the bones or joints. Electromyography (EMG) or nerve conduction studies may be carried out to evaluate the LFCN function and rule out other nerve problems, including a lumbar disc compressing a lower back nerve root.
Treatment
Meralgia paresthetica treatment aims to effectively manage symptoms, relieve nerve compression and prevent recurrence. Our clinic offers a range of options, including both non-surgical and surgical approaches.
Non-surgical options:
Weight management: Reducing body weight can ease symptoms and lessen the strain on the LFCN.
Activity adjustment: You can minimize nerve compression by avoiding activities like cycling or running that make the discomfort worse.
Over-the-counter pain medications: Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and naproxen help relieve mild to moderate discomfort and inflammation.
Neuropathic analgesia: Examples of drugs that help lessen nerve pain include gabapentin, amitriptyline, and nortriptyline.
Physiotherapy: This involves stretches and exercises to increase the range of motion, build stronger hip and thigh muscles, and reduce localized nerve compression.
Corticosteroid injections: These injections can be administered to ease pain and inflammation in the area around LFCN.
Surgical options:
Sometimes, surgery may be an option; especially if conservative treatments do not offer sufficient relief. Decompression of the LFCN, which entails the release of the compressed nerve to enable free movement, is the common surgical procedure for meralgia paresthetica.
Other management tips for meralgia paresthetica are:
Avoiding tight clothing or restrictive belts.
Maintaining a healthy weight to minimize stress on the LFCN.
When sleeping on your side, consider placing a pillow between your knees to reduce strain on the affected area.
