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Is it just a bunion, or arthritis of the big toe? Most people think they are the same problem because, from the outside, both can look like a bump near the big-toe joint. They are actually very different conditions — and telling them apart changes the entire treatment plan. That is why a podiatrist and an X-ray are so important.

Bunion vs. Hallux Rigidus

A bunion (hallux abductovalgus) is a malalignment: the first metatarsal drifts inward and the big toe leans toward the others, pushing the joint out into a visible bump. On X-ray, the joint space is preserved — the cartilage is still there.

Hallux rigidus is arthritis of that same joint. On X-ray the joint space is narrowed or gone, with bone spurs and bone-on-bone contact. The bump here is often arthritic bone on top of the joint rather than a sideways lean.

In the X-ray of a single patient below, the arrows show a normal joint space on one side (a bunion) and no joint space on the other (arthritis). They look identical on the surface, but the imaging tells the real story.

Why the Difference Matters for Treatment

Treating a bunion as if it were arthritis — or vice versa — leads to disappointing results, so an accurate diagnosis comes first.

For more information or to have your big-toe joint evaluated by a board-certified foot and ankle specialist, call (239) 430-3668 (FOOT) or book online at NaplesPodiatrist.com.


Serving Southwest Florida since 2005, Family Foot & Leg Center has 9 convenient locations throughout Collier, Lee, Charlotte, and Sarasota Counties — Naples, Estero, Fort Myers, Cape Coral, Port Charlotte, and Sarasota. We provide pediatric to geriatric foot and ankle care: ingrown toenails, heel pain, bunions, foot & ankle arthritis, plantar fasciitis, foot & ankle surgery, custom orthotics, and diabetic wound care — with in-office X-rays, diagnostic ultrasound, and minor surgical suites. Home of the Lam Minimally Invasive No-Scar Bunion Surgery. Same-day appointments and easy online scheduling.

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Written by Dr. Kevin Lam, D.P.M., F.A.C.F.A.S.

Dr. Kevin Lam, DPM, FACFAS, DABLES, DABPS is Clinical Director of Family Foot and Leg Center, PA — Southwest Florida's premier podiatric practice. He earned his Doctor of Podiatric Medicine degree with honors from Temple University School of Podiatric Medicine and completed advanced surgical training at Mount Sinai Medical Center and Jackson Memorial Health System, Miami. Named among America's Top Podiatrists. Board-certified in foot surgery, reconstructive rearfoot and ankle surgery, and lower extremity surgery. Serving Southwest Florida since 2005 across 9 locations from Marco Island to Sarasota.