Someone experiencing burning pain in his right leg may have sciatica or meralgia paresthetica, according to MedlinePlus and the American Academy of Orthopaedic Surgeons. In sciatica, pain results from pressure on the sciatic nerve. Meralgia paresthetica results from pressure on the lateral femoral cutaneous nerve.
Sciatica is not a medical condition but a symptom of spinal stenosis, a slipped disk, a tumor, a pelvic injury or another medical problem, notes MedlinePlus. Individuals typically experience pain on one side that can vary in intensity and may cause leg numbness or weakness. Symptoms can extend from the buttocks to the toes. Treatments include applying cold and then heat to the affected area, ibuprofen and other over-the-counter pain relievers.
Patients with meralgia paresthetica usually experience a burning, numbness or tingling feeling on the outer thigh on one side of the body, with pain often extending to the outer knee, according to the American Academy of Orthopaedic Surgeons. Common causes of the condition include wearing tight clothing or a heavy tool belt, suffering an injury while wearing a seat belt during a motor vehicle accident or gaining weight. The cause of the condition determines the treatment.