Live X-rays will be utilized by your physician to guide the radiofrequency ablation needles next to the nerves that supply the sacroiliac joint. Once motor and sensory tests confirm that the needles are next to the nerve, the nerves will be numbed and the radiofrequency ablation will begin. Patients may feel pressure in the back during testing and ablation. After the procedure, patients will receive medication to calm down the ablated nerves. Pain relief will begin within two weeks and can last up to a year.