Kentuckiana Pain Specialists

Sacroiliac Joint Injections

Targeted care for lower back, hip, buttock, groin, and referred leg pain. Image-guided injections to help confirm whether the sacroiliac joint is contributing to your symptoms and to reduce inflammation in the affected area.

What Is a Sacroiliac Joint Injection?

The sacroiliac (SI) joint sits where the sacrum meets the pelvis, with one joint on each side of the lower back and buttock. These joints transfer weight between the upper body and the legs and allow limited, supportive movement. When an SI joint becomes painful, it can cause discomfort near the joint or refer pain into the hip, buttock, groin, abdomen, or leg.

A sacroiliac joint injection is a minimally invasive procedure that places medication into the SI joint, usually a local anesthetic and sometimes a corticosteroid. It may serve two purposes:

  • Diagnostic: If your usual pain improves shortly after the numbing medication, it may suggest the SI joint is contributing to your symptoms.
  • Therapeutic: If a steroid is included, it may reduce inflammation in the joint. Some patients notice longer-lasting improvement, while others have temporary or limited relief.

Relief may begin soon after the injection, although pain can temporarily return before the anti-inflammatory medication takes effect.

Symptoms That May Be Related to SI Joint Pain

The SI joint may be irritated by arthritis, injury, repetitive stress, pregnancy-related pelvic changes, prior lumbar spine surgery, leg-length differences, or abnormal walking patterns. You may be evaluated for an injection if you experience symptoms such as these. SI joint pain can resemble disc pain, sciatica, lumbar facet pain, or hip pain, so a medical evaluation is needed to confirm whether the joint is involved.

Lower Back & Pelvic Pain

Pain in the lower back, often near one side of the pelvis.

Buttock & Hip Pain

Discomfort in the buttock and hip on the affected side.

Groin or Leg Pain

Pain may extend into the groin or travel into the thigh or leg.

Pain When Changing Position

Pain when standing from a seated position or turning in bed.

Pain With Activity

Discomfort with walking, climbing stairs, or after prolonged sitting or standing.

Pain Unlike Muscle Soreness

Pain that feels different from typical muscle soreness and is hard to pinpoint.

What Happens During the Procedure

If needed, an IV may be started so relaxation medication can be given. You lie on an X-ray table and the skin over the lower back and buttock is cleaned, then numbed with local anesthetic, which may sting briefly.

Using X-ray guidance, Dr. Ajith Nair directs a small needle into the sacroiliac joint. A few drops of contrast dye may confirm correct placement before a mixture of numbing and anti-inflammatory medication is slowly injected. It is typically an outpatient procedure.

Benefits of Sacroiliac Joint Injections

Sacroiliac joint injections can provide both diagnostic information and, in some cases, symptom relief. They are not a guaranteed cure but one part of a broader pain management plan. Results vary, and as with any injection there are possible risks such as temporary soreness, bruising, bleeding, infection, a brief increase in pain, or short-term numbness, though serious complications are uncommon.

What to Expect After the Injection

Recovery is usually straightforward. Here is what most patients can expect in the hours and days after a sacroiliac joint injection.

Immediately After

About 20 to 30 minutes after the procedure, you may be asked to move your back, hips, or legs in ways that usually cause pain to check whether symptoms improve. You may also be asked to track relief in a pain diary over the next week.

How You'll Feel

Temporary numbness, slight leg weakness, or an unusual sensation may last a few hours. A brief increase in pain over several days can occur before the steroid takes effect. Ice usually helps more than heat for the first two to three days. Improvement, when it occurs, often begins within two to five days, and relief duration varies from person to person.

Medication & Activity

Most patients resume regular medications, but you may be asked to limit pain medication for four to six hours to keep diagnostic results accurate. Do not stop blood thinners or chronic medications unless instructed. Avoid driving and strenuous activity on the day of the injection, then return to light activity the next day and increase exercise gradually.

Physical Therapy

Your provider may recommend physical therapy while pain is reduced, focusing on pelvic stability, core and hip strength, flexibility, and safer movement patterns to support long-term function.

Not sure what options are right for you?

At Kentuckiana Pain Specialists, cancer pain management is approached with compassion, safety, and clear communication. Our team works to understand your pain source, current treatment plan, medication use, and quality-of-life goals, and discusses advanced options when appropriate to improve comfort while supporting your overall cancer care plan.

Frequently Asked Questions

The sacroiliac joint is located where the lower spine meets the pelvis. There is one SI joint on each side of the lower back and buttock region. These joints help transfer weight between the upper body and legs.
It may help determine whether the SI joint is contributing to your pain. If numbing medication temporarily reduces your usual pain, the joint may be a likely source. If steroid medication is used, it may also help reduce inflammation in some patients.
You lie on an X-ray table while the lower back and buttock area is cleaned. The physician numbs the skin, uses X-ray guidance to place a small needle into the SI joint, confirms placement with contrast dye, and then injects numbing and anti-inflammatory medication.
About 20 to 30 minutes after the injection, you may be asked to move in ways that usually cause your pain. You may also be asked to track your pain levels in a pain diary for the next week.
Some patients may feel temporary numbness, slight weakness, or an unusual sensation in the leg for a few hours after the injection. This usually improves as the numbing medication wears off.
Yes. Some patients notice a temporary increase in pain for several days as the numbing medication wears off before the steroid begins to work.
Some patients begin to notice improvement within two to five days. If there is no improvement within about 10 days, meaningful relief from that injection is less likely.
Many patients can resume regular medications, but instructions may vary. You may be asked to limit pain medication for the first four to six hours so your provider can accurately assess the diagnostic effect of the injection.
You should not drive on the day of the injection, especially if sedation or relaxation medication is used. Arrange for transportation if instructed by your care team.
Most patients can return to light regular activities the day after the procedure. Strenuous activity should be avoided on the day of the injection, and exercise should be resumed gradually.
No. A sacroiliac joint injection is not a guaranteed cure. It may help diagnose SI joint pain and may reduce inflammation, but results and duration of relief vary.

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Kentuckiana Pain Specialists

If you or a loved one is experiencing cancer-related pain, schedule a consultation with Kentuckiana Pain Specialists to discuss advanced pain management options. Call (502) 995-4004 today.