Heel spurs are diagnosed primarily through X-rays, but the process usually starts with a physical exam and a conversation about your symptoms. Here’s the important caveat upfront: about 50% of people with plantar fasciitis have visible heel spurs on X-ray, yet many people with heel spurs have zero pain. Roughly 11 to 16% of the general population has heel spurs without any symptoms at all. So diagnosing a heel spur is straightforward, but figuring out whether it’s actually causing your pain is the harder question.
What Happens During the Physical Exam
Your doctor will start by pressing along the bottom of your heel, specifically where the thick band of tissue on the sole of your foot (the plantar fascia) connects to the heel bone. They’re feeling for a precise point of tenderness, any swelling, and whether the heel pad itself has thinned out. They’ll also bend your toes back toward your shin while pressing on the heel to see if that reproduces or worsens the pain.
Beyond the heel itself, the exam checks for nerve-related symptoms like numbness, tingling, or unusual sensitivity along the inside of the foot. These findings help distinguish a bone spur from nerve entrapment or other conditions that can mimic the same type of pain. Your doctor will also look at how your foot moves, how you stand, and whether there’s any visible deformity.
Questions Your Doctor Will Ask
The conversation before the exam matters as much as the exam itself. The hallmark symptom that points toward heel spur territory is throbbing pain on the inner side of the heel that’s worst with your first steps after getting out of bed or standing up after sitting for a while. Your doctor will want to know when the pain started, whether it came on gradually or suddenly, and what makes it better or worse.
They’ll also ask about recent changes in your activity level, your typical footwear, and whether you’ve switched to harder walking or standing surfaces. A sudden jump in exercise or prolonged standing in unsupportive shoes points in one diagnostic direction, while pain that started after a specific injury or worsens steadily even at rest suggests something else entirely, like a stress fracture. These details help your doctor narrow the list of possibilities before ordering any imaging.
X-Rays: The Standard Imaging Tool
A standing (weight-bearing) X-ray of the foot is the go-to test for confirming a heel spur. Spurs show up clearly on lateral views as a small bony projection extending from the bottom of the heel bone. Most spurs measure 3 to 5 millimeters, though they can vary widely. Spurs larger than 10 millimeters are uncommon.
X-rays are also useful for ruling out other causes of heel pain, including stress fractures and arthritis. However, an X-ray alone can’t tell your doctor whether the spur is the source of your pain. As the American Academy of Orthopaedic Surgeons notes, heel spurs do not cause plantar fasciitis pain, and plantar fasciitis can be treated without removing the spur. The spur is often a sign of long-standing tension at the spot where the plantar fascia attaches to the bone, more of a marker than a culprit.
When Ultrasound or MRI Is Needed
X-rays only show bone. They can’t reveal inflammation in the plantar fascia, damage to tendons or ligaments, or problems with the soft tissue around the heel. When your doctor suspects one of these conditions, or when your pain doesn’t match the typical pattern, they may order additional imaging.
MRI is considered the gold standard for evaluating soft tissue problems in the heel. It can detect plantar fascia thickening, small tears, nerve issues, and other conditions that plain X-rays miss entirely. The downside is cost and wait times. Ultrasound offers a cheaper, faster alternative that’s particularly good at showing inflammation in the plantar fascia and surrounding soft tissues. Some clinicians now use ultrasound as a first-line tool for heel pain when the main question is whether soft tissue inflammation is present, sometimes skipping the X-ray altogether.
Conditions That Look Like Heel Spurs
Several conditions produce heel pain that feels similar to what you might expect from a spur. Your doctor is actively ruling these out during the diagnostic process:
- Plantar fasciitis involves inflammation of the tissue band running along the bottom of your foot. It’s the most common cause of heel pain and frequently coexists with spurs, but the two are separate conditions.
- Calcaneal stress fracture causes pain that typically starts after a spike in activity and initially hurts only during movement, later progressing to pain even at rest.
- Heel pad syndrome happens when the fat pad under your heel thins or becomes damaged, reducing its ability to cushion impact.
- Nerve entrapment (tarsal tunnel syndrome or Baxter’s nerve entrapment) produces burning, tingling, or numbness and tends to worsen with standing or walking but improves with rest and loose shoes.
- Achilles tendinitis causes pain at the back of the heel rather than the bottom, where spurs typically cause discomfort.
The location, timing, and character of your pain are what separate these conditions from each other. Pain that’s sharp and concentrated on the bottom inner heel with first morning steps leans toward plantar fasciitis with or without a spur. Pain that radiates, tingles, or occurs at the back of the heel points elsewhere.
Who Diagnoses Heel Spurs
A primary care doctor can handle the initial evaluation and order X-rays. If the diagnosis is unclear or treatment isn’t working, you’ll typically be referred to a podiatrist (a foot and ankle specialist) or an orthopedic surgeon. Podiatrists focus exclusively on foot and ankle conditions and are well-equipped for most heel spur cases. If your heel pain is accompanied by problems in your legs, hips, or back, an orthopedist may be a better fit since they can evaluate the broader picture. In some cases, people who start with an orthopedist end up referred to a podiatrist for more targeted foot care, or vice versa.
What the Diagnosis Actually Means
Finding a heel spur on X-ray doesn’t automatically mean the spur needs treatment. Because spurs are so common in people without any symptoms, the real diagnostic goal is determining what’s generating your pain. A spur that shows up alongside clinical signs of plantar fasciitis is usually treated as a plantar fasciitis case, not a spur case. Treatment focuses on reducing inflammation and tension in the soft tissue rather than addressing the bony growth itself.
If your imaging and exam rule out soft tissue problems and your pain pattern maps directly to the spur’s location, only then is the spur considered the primary issue. This distinction shapes everything about how your pain gets managed going forward, which is why the diagnostic process involves more detective work than a single X-ray might suggest.