Sacroiliac Joint Injection Information

Why your doctor may recommend a sacroiliac joint injection, how the procedure is performed and what to expect afterward.

What is the sacroiliac joint and why is a sacroiliac joint injection helpful?

The sacroiliac joint is a large joint in your lower back and buttocks region. When the joint becomes painful, it can cause pain in its immediate region or it can refer pain into your groin, abdomen, hip, buttock or leg.

sacroiliac jointsThis labeled illustration shows you where the sacroiliac joints are located in relationship to the sacrum, hip bones (iliac crest) and coccyx (tailbone). Photo Source:


A sacroiliac joint injection serves several purposes. First, by placing numbing medicine into the joint, the amount of immediate pain relief you experience will help confirm or deny the joint as a source of your pain. That is, if you obtain complete relief of your main pain while the joint is numb it means this joint is more likely than not your pain source. Furthermore, time-release cortisone will be injected into the joint to reduce any presumed inflammation, which on many occasions can provide long-term pain relief.

Although there are numerous ways to treat sacroiliac joint dysfunction, sacroiliac joint injections work powerfully to reduce your inflammation and they can provide months of relief.

sacroiliac joint injections are guided by real time x-rays called fluoroscopyA sacroiliac joint injection is a sterile procedure performed under the guidance of fluoroscopy; a type of real time x-ray the physician uses to accurate position the needle. Photo Source:

What will happen to me during the procedure?

If needed, an IV will be started so that adequate relaxation medication can be given. After lying on an x-ray table, the skin over your lower back/buttock will be well cleansed. Next, the physician will numb a small area of skin with numbing medicine (anesthetic) which stings for a few seconds. The physician then will use x-ray guidance to direct a very small needle into the joint. He will then inject several drops of contrast dye to confirm that the medication only goes into the joint. A small mixture of numbing medication (anesthetic) and anti-inflammatory cortisone will then be slowly injected.

What should I do and expect after the procedure?

Twenty to 30 minutes after the procedure, you will move your back to try to provoke your usual pain. You will report your remaining pain, (if any) and also record the relief you experience during the next week in a €œpain diary. You may or may not obtain improvement in the first few hours after the injection, depending on if the sacroiliac joint is your main pain source.

On occasion, you may feel numb, slightly weak or have an odd feeling in your leg for a few hours after the injection. You may notice a slight increase in your pain lasting for several days as the numbing medication wears off before the cortisone is effective. Ice will typically be more helpful than heat in the first 2-3 days after the injection.

You may begin to notice an improvement in your pain 2-5 days after the injection. If you do not notice improvement within 10 days after the injection, it is unlikely to occur. You may take your regular medications after the procedure, but try to limit them for the first 4-6 hours after the procedure, so that the diagnostic information obtained from the procedure is accurate. You may be referred for physical or manual therapy after the injection while the numbing medicine is effective and/or over the next several weeks while the cortisone is working.

On the day of the injection, you should not drive and should avoid any strenuous activities. On the day after the procedure, you may return to your regular activities. When your pain is improved, start your regular exercise/activities in moderation. Even if you are significantly improved, gradually increase your activities over 1-2 weeks to avoid recurrence of your pain.

*SpineUniverse Editorial Comment: Dr. Dreyfuss has provided excellent information for patients who undergo this procedure. Instructions and information provided by your physician may vary.

Updated on: 02/05/19
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Treatments for Sacroiliac Joint Dysfunction
The sacroiliac joint can precipitate back pain with possible referred symptoms into the buttock, leg, and/or foot. In a study published from the Penn Spine Center, it was demonstrated that these symptoms can begin spontaneously or following trauma. The only test that proves that the facet joint is the source of pain is a diagnostic facet joint block, as CT scan, x-Ray, and MRI are usually unremarkable. In contrast to a treatment or therapeutic block (injection) in which a steroid is used, a diagnostic injection only uses a local anesthetic. It is essential that the specific offending joint be identified so that a targeted therapeutic injection can be offered. While many patients will be successfully relieved of their symptoms, not everyone is cured. In fact, in our study published from the Penn Spine Center, nearly 2 of 3 severely impaired patients obtained dramatic relief of their back and leg pain following therapeutic sacroiliac joint injection.
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Treatments for Sacroiliac Joint Dysfunction

From over-the-counter medications to physical therapy and exercise, these sacroiliac joint dysfunction treatments can help reduce or even prevent your low back pain.
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