Leg Pain Misdiagnosed as Sciatica? It Could Be Your Circulation

You’ve been to your doctor for leg pain. You’ve been told it’s sciatica or arthritis. You’ve done physical therapy, you’ve taken anti-inflammatories, you’ve had an MRI of your spine that showed “some degenerative changes.” But the treatment hasn’t helped. The leg cramping and aching still comes on when you walk, still forces you to stop and rest, still returns when you resume walking. Nothing about your back treatment has touched it.

When leg pain has the classic features of claudication — predictable onset with walking, relief with rest, reproducible distance — but has been attributed to spinal or musculoskeletal causes without improvement, peripheral artery disease should be specifically evaluated. The two can coexist, but PAD claudication requires vascular evaluation and treatment, not spine care.

At Seamless Medical Centers, Dr. Zagum Bhatti, Board-Certified Interventional Radiologist, provides vascular evaluation and PAD treatment for Houston-area patients from Katy, Sugar Land, The Woodlands, Pearland, Humble, and communities across Harris County and Montgomery County. Houston-area patients are seen at our Port Arthur office. Houston PAD service. Port Arthur PAD service.

Why PAD Gets Mistaken for Sciatica

PAD and lumbar radiculopathy (sciatica) both cause leg pain that worsens with activity. Both are common in older adults. Both may coexist in the same patient. The distinction is in the details: vascular claudication follows a precise activity-distance-rest-relief cycle, the pain is cramping in specific muscle groups (usually the calf), and relief is complete within minutes of stopping. Sciatic pain tends to be more shooting or burning, often extends from the back into the leg, is associated with specific spine movements or positions, and may be present at rest.

The ankle-brachial index (ABI) is the key diagnostic test that distinguishes them. An ABI measures blood pressure at the ankle compared to the arm — a simple, non-invasive test that can be performed in a clinic and provides objective evidence of arterial restriction. If PAD has not been specifically tested with an ABI, the vascular cause has not been ruled out, regardless of what the spine imaging shows.

For patients in The Woodlands, Kingwood, Cypress, and Spring who have been through rounds of spine-focused care without improvement, the comparison of PAD versus sciatica and arthritis describes the key distinguishing features in detail.

What an Accurate Vascular Workup Looks Like

When leg pain has been attributed to the spine but spine-focused treatment has not helped, a vascular workup can establish whether reduced circulation is the missing piece. The central test is the ankle-brachial index, a painless comparison of blood pressure at the ankle and the arm; a value below roughly 0.9 indicates significant arterial narrowing. When symptoms are clearly brought on by walking but the resting index is borderline, an exercise ankle-brachial index measured after walking can expose a circulation problem that is hidden at rest.

If these tests point to PAD, duplex ultrasound and CT or MR angiography map the location and severity of the blockages so that treatment can be planned precisely. The important principle is simple: if an ankle-brachial index has never been done, peripheral artery disease has not actually been ruled out, no matter what the spine imaging shows.

When Spine and Artery Problems Coexist

Lumbar spine disease and peripheral artery disease are both common in older adults and frequently occur together, which is one reason vascular causes are so often overlooked. When both are present, treating only the spine leaves the arterial component unaddressed, and the leg symptoms persist. This is why persistent leg pain after physical therapy, injections, or even spine surgery deserves a vascular evaluation when it carries the hallmark features of claudication, a predictable onset with walking and reliable relief with rest.

At Seamless Medical Centers, Dr. Bhatti concentrates on that vascular question: confirming or excluding arterial disease with objective testing, and, when significant PAD is found and is limiting activity, restoring blood flow through minimally invasive, outpatient procedures performed through a small puncture. The practice serves Southeast Texas and western Louisiana from its Port Arthur office.

What Happens After a PAD Diagnosis

If testing confirms peripheral artery disease, the next step is to determine how much it is contributing to the symptoms and whether treatment is warranted. Mild disease is often managed with exercise, risk-factor control, and medication. When symptoms limit daily activity, imaging maps the blockages and a minimally invasive procedure can restore blood flow through a small puncture, on an outpatient basis. Where spinal or joint disease is also present, treating the vascular component does not replace care for those conditions, but it does address the part that spine-focused treatment could never reach.

Because PAD also signals broader cardiovascular risk, a diagnosis prompts attention to the heart and brain as well, which makes the evaluation valuable even when leg symptoms turn out to be only part of the picture.

If Spine Treatment Has Not Helped

When rounds of spine-focused care have not relieved leg pain that still follows the walking-and-rest pattern, a few questions can help redirect the workup. It is reasonable to ask whether peripheral artery disease has actually been tested for, and specifically whether an ankle-brachial index has ever been performed, because spine imaging, however detailed, says nothing about arterial flow. It is also fair to ask whether the leg symptoms truly match the spine findings, since degenerative changes are common with age and do not always explain a person’s pain.

Persistent leg pain after physical therapy, injections, or even surgery does not necessarily mean the original treatment failed; it may mean a second, vascular cause was present all along. A straightforward circulation evaluation can settle the question, and if PAD is found, it is both treatable on its own terms and an important signal for overall cardiovascular health.

If your leg pain has the hallmarks of claudication and spine-focused care has not helped, asking for a circulation evaluation is a reasonable and often clarifying step. It does not mean the earlier diagnosis was wrong, only that a second cause may have been present alongside it. An ankle-brachial index is quick, painless, and definitive about whether the arteries are involved, and if peripheral artery disease is found, it can be treated on its own terms while any spine or joint care continues. Getting the full picture is what finally allows treatment to match the actual source of the pain rather than chasing the wrong target.

When a Sciatica Diagnosis Doesn’t Add Up

If you have been treated for sciatica or arthritis but your leg pain keeps returning in the same place at the same walking distance, it is worth asking whether something was missed. The hardest part of a misdiagnosis is not only the pain that never quite resolves; it is the months or years spent on physical therapy, injections, imaging, and sometimes surgery aimed at a structure that may not have been the real problem. Spine imaging almost always shows some age-related change, and that finding can seem to confirm a back diagnosis even when the changes are incidental and reduced circulation is the actual cause.

The detail that breaks the cycle is consistency. Sciatica and arthritis tend to shift with position and movement, while vascular leg pain appears at a reliable walking distance and settles within minutes of standing still. If that activity-and-rest rhythm sounds like your experience, it is reasonable to ask whether your circulation has ever been tested directly, because no amount of spine-directed treatment will relieve pain that originates in a narrowed artery. A single, painless ankle-brachial index can answer the question that rounds of back-focused care may have left open.

Frequently Asked Questions About PAD Misdiagnosis

Q1. Can I have both sciatica and PAD at the same time?

Yes. The two conditions are not mutually exclusive and frequently coexist in older adults because they share cardiovascular risk factors and age as contributors. When both are present, both need to be treated. Treating only the spine component while leaving significant arterial disease unaddressed does not achieve full functional recovery.

Q2. What test confirms PAD specifically?

The ankle-brachial index (ABI) is the standard screening test for PAD. An ABI below 0.9 indicates significant arterial narrowing. This test is inexpensive, non-invasive, and takes only a few minutes. If you have leg pain with walking that has not been evaluated with an ABI, requesting one is appropriate.

Q3. If I have had spine surgery but still have leg pain, could it be PAD?

Persistent leg pain after spine surgery that follows the activity-rest-relief pattern of claudication should be evaluated for PAD, as spine surgery does not address arterial disease. Post-surgical leg pain attribution to ‘failed back surgery syndrome’ may be incomplete if vascular claudication is a contributing factor.

Q4. How quickly can a vascular evaluation determine whether I have PAD?

An ABI can be performed and interpreted at a single clinic visit. If the ABI suggests PAD, additional imaging such as duplex ultrasound or CT angiography provides detailed information about blockage location and severity to guide treatment planning.

Schedule Your Consultation

Houston-area patients are seen at our Port Arthur office. Contact Seamless Medical Centers to schedule. Phone: 409-213-9575. Address: 3300 Jimmy Johnson Blvd, Suite #130, Port Arthur, Texas 77642.