Is It SI Joint Pain, Sciatica, or a Disc Problem?

You stand up from a chair and feel a sharp ache near your belt line. Getting out of bed is uncomfortable, but after walking around for a few minutes, things begin to loosen up.

Is it your back? Your hip? That disc injury someone mentioned years ago?

At Cavanaugh Chiropractic in Lafayette, we hear these questions regularly. Pain in this area can come from several different structures, including the sacroiliac joints, often called the SI joints. Understanding the pattern helps us decide what to examine, but symptoms alone do not give us the whole answer.

Where does SI joint pain usually hurt?

Your SI joints connect the lower part of your spine to your pelvis. You have one on each side.

In our office, patients with suspected SI joint pain often point to a fairly specific spot near one of the dimples in their lower back. They may describe discomfort just below the belt line, sometimes extending into the buttock or surrounding area.

That pointing pattern is sometimes called the Fortin finger test. It can be a useful clue, but it does not establish the diagnosis by itself. We combine the history with an examination and several tests that assess whether stressing the SI joint reproduces the familiar pain.

Patients also commonly tell us that getting out of a chair, getting out of bed, or taking those first few steps hurts. Movement may help them loosen up, although the discomfort does not necessarily disappear.

For more about the condition and our treatment approach, visit our SI joint dysfunction page.

How is that different from a lumbar disc problem?

A lumbar disc problem can cause lower back pain. If it irritates a nerve root, symptoms may also travel into the leg, sometimes with numbness, tingling, or weakness.

In our experience, some patients describe disc-related back pain by placing their whole hand across the lower back. Others with suspected SI joint pain point to one particular spot.

Those descriptions help guide our examination, but they are not rules. A disc problem does not always cause pain in the center of the back, and SI joint pain does not always stay in one small area.

We also avoid using the knee as a dividing line between diagnoses. Where pain travels matters, but we still need to assess movement, sensation, strength, reflexes, and other findings.

Not every pain traveling into the leg is sciatica

Patients often use “sciatica” to describe any pain spreading from their back or hip into a leg. We understand what they mean, but the distinction matters when deciding how to help.

Pain related to an irritated nerve can behave differently from pain referred from a joint or another structure. Pain around the buttock, outer hip, groin, or thigh can have several possible sources.

Even the word “hip” can mean different things. A patient might mean the actual hip joint, the side of the pelvis, or the area near an SI joint.

That is why we ask you to show us exactly where it hurts and describe what happens when you move. We want to understand the symptoms behind the label.

“But my MRI already showed a disc problem”

One point we regularly discuss with patients is that an old diagnosis should not automatically explain every new episode of pain.

If you previously had an MRI showing a disc problem, we take that history seriously. We also compare it with what you are experiencing now. Your current symptoms and examination help us decide whether that finding fits this episode.

The goal is to evaluate the problem in front of us rather than assume that every future ache comes from the same place.

You do not have to remember an injury

Another common comment is, “I didn’t do anything to hurt myself.”

You do not always need a car accident, a sports injury, or a memorable lifting incident to develop pain. Patients sometimes describe symptoms after prolonged sitting, driving, a change in activity, or the ordinary demands of daily life.

That does not mean every ache represents damaged tissue. It means the absence of a dramatic incident does not make your symptoms less real or remove the need to evaluate them.

We want to know what your day looked like before the pain started, even if nothing seemed unusual at the time.

What can you do at home while waiting to be examined?

Our advice depends on your symptoms and what you can comfortably tolerate. Before an examination, we cannot be certain that the SI joint is the source.

If pain is intense, start by finding a comfortable position. Avoid forcing a stretch or repeatedly testing a movement that makes the pain worse.

Heat or ice may provide temporary relief. Use a towel between your skin and the pack, follow the product’s directions, and avoid sleeping with it in place. Choose the option that feels helpful rather than continuing something that increases discomfort.

When you can tolerate it, gentle movement and short walks are often preferable to spending the entire day on the couch. Change positions regularly and scale back activities that aggravate your symptoms.

Our practical message is simple: keep moving within your comfort, but do not force your way through worsening pain.

When should you get checked?

We encourage patients to contact us when pain is new, recurring, interfering with daily activities, or leaving them unsure about what they should do.

An examination is about more than treatment in the office. It also helps us offer practical advice about which activities to continue, which to modify, and whether another healthcare provider should be involved.

We do not make those decisions from a pain score alone. How you move, what you can do, how symptoms are changing, and whether there are neurological findings all matter.

Some symptoms need urgent medical care. New difficulty urinating, loss of bladder or bowel control, or numbness around the groin or saddle area warrants emergency evaluation. These can be warning signs of cauda equina syndrome, a serious problem involving the lower spinal nerve roots.

New or worsening leg weakness, including difficulty lifting the front of your foot, also needs prompt medical assessment. Do not assume it is simply SI joint pain or wait for a routine chiropractic appointment.

What can you expect at Cavanaugh Chiropractic?

We begin by working out what is contributing to your symptoms. If conservative chiropractic care is appropriate, we tailor treatment to your examination findings, comfort, and response.

Some patients notice improvement quickly. Others need a more gradual approach. We cannot promise that one adjustment will make the pain disappear.

Medication or other medical care may also be appropriate. Those decisions belong with the appropriate medical provider, and we refer when necessary.

We welcome walk-ins and try to accommodate same-day appointments when availability allows. Calling ahead helps our small practice plan your visit and lets us discuss how soon you should be seen.

If pain near your belt line or buttock has you wondering whether it is your SI joint, a disc, or something else, contact Cavanaugh Chiropractic in Lafayette to schedule an evaluation.