A bunion is the one foot problem where a toe spacer company can point to trials rather than testimonials. It is also the one where the limits of those trials matter most, because the internet is full of devices promising to "reverse" a bunion, and the research does not say that. Here is what it does say.
What a bunion is
The bump at the base of the big toe is not new bone. It is the joint itself, pushed sideways. The big toe drifts toward its neighbours — hallux valgus — and the head of the first metatarsal, the long bone behind it, angles outward to become the bump. As the angle increases, the joint becomes less stable and the big toe does less of the work it should in each step.
About 12% of adults aged 20 to 60 have one, and prevalence rises with age.1 It is more common in women, runs in families, and is strongly associated with hammertoe of the second toe, which gets crowded out of the way.2
What causes them — and what doesn't, as much as people think
Foot structure and inheritance are the largest factors. Footwear contributes — a narrow toe box pushes the big toe inward for hours at a time, and a raised heel loads the forefoot — but it is a contributor, not the whole story. The clearest demonstration of that comes from ballet, where dancers spend years in the most compressive footwear there is, and the dance medicine literature nevertheless finds that hours on pointe, years on pointe, and age of starting are not significantly associated with bunion rates.3 If shoes alone did it, that would not be the finding.
What conservative care can and can't do
Start with the honest ceiling. Surgery corrects a bunion. Nothing else has been shown to. Wider shoes, pads, orthoses, splints and exercises can reduce pain, improve function, and — in mild to moderate cases — reduce the angle by a measurable amount. They do not put a severe bunion back where it was. If yours is rigid, painful in ordinary shoes, or getting worse despite sensible care, that is a surgical conversation.
Within that ceiling, there is more real evidence than for almost any other foot condition.
What the trials show
The device on its own did nothing. In 2015, 24 people with hallux valgus wore a toe orthosis for eight weeks. Half also did a toe-spread-out exercise — actively pulling the big toe away from the second. The orthosis-only group showed no significant change in anything measured. The group that added the exercise improved significantly in all three measures: a smaller hallux valgus angle, a smaller angle during active abduction, and a larger abductor hallucis — the muscle that pulls the big toe outward.4
A combined programme held up at one year. In 2018, 56 women with moderate hallux valgus were randomised to either 36 sessions over three months of joint mobilisation, strengthening for hallux abduction and plantarflexion, toe grip work, ankle stretching and a toe separator — or a waiting list. At twelve months the treatment group had less pain and better function scores.5
Exercise did the work whether or not a spacer was added. In 2026, 25 adults did six weeks of foot strengthening; half also wore a silicone toe spacer. Both groups reduced their hallux valgus angle and increased active big-toe flexion range. The spacer added nothing on top.6
A systematic review reached the same place. A 2024 review of toe separators in physiotherapy concluded they can be a valuable tool in the conservative treatment of hallux valgus and associated deformities.7
Read together: separators show up inside programmes that work, but when the separator is isolated, the exercise turns out to be carrying the effect. That is the single most important thing to understand about any toe spacer, including ours.
Where it stops
- Mild to moderate only. Every trial above enrolled people with mild or moderate deformity. None tested severe or rigid bunions, and there is no reason to expect the same result there.
- Small samples. Twenty-four, fifty-six, twenty-five. The direction is consistent; the size of the effect is not precise.
- Angle changes were modest. A few degrees. Enough to matter for symptoms and progression; not a straightening.
- The movement, not the device. If you wear a spacer and do nothing else, the 2015 trial says to expect nothing.
- Nobody has tested prevention. These are treatment studies in people who already had the deformity.
What to do
- Wider shoes, first. The mechanical driver you can remove today, at no cost.
- The exercise. With the big toe held apart from the second, draw it outward and hold; then close the toes against resistance. Ten minutes, seated, every other day. This is the toe-spread-out work from the 2015 trial, and it is what a spacer is for.
- A podiatrist, early rather than late. Conservative care has its best chance while the bunion is still flexible. And a surgical opinion is not a failure — for a severe bunion it is the only thing that corrects it.
Where Toe-Rx fits
Toe-Rx holds the toes apart at a width most people cannot reach unassisted and gives them something to close against — the two halves of the movement the trials tested. It is a tool for the exercise. It is not the exercise, and worn passively it is not expected to do anything. Sizing is by street shoe size, three sizes, two firmnesses; if the big toe has already drifted, the first slot will feel tighter than the others, which is the deformity rather than the fit. How to use it is here.
If you dance, the question of whether ballet causes bunions is its own article, and the answer is less obvious than it looks: Do pointe shoes cause bunions?
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
References
- Global prevalence and incidence of hallux valgus: a systematic review and meta-analysis. Journal of Foot and Ankle Research, 2023. Read it
12.22% in adults aged 20–60. Authors to be added. - Hammertoe. StatPearls. NCBI Bookshelf NBK559268. PMID: 32644694. Read it
For the hallux valgus / second-toe association. - Maddocks M. Bunions in ballerinas: it's not really the shoes! International Association for Dance Medicine & Science, 2017. Read it
A clinical review summary, not a peer-reviewed paper. Used here only for the footwear-exposure point. - Kim MH, Yi CH, Weon JH, Cynn HS, Jung DY, Kwon OY. Effect of toe-spread-out exercise on hallux valgus angle and cross-sectional area of abductor hallucis muscle in subjects with hallux valgus. Journal of Physical Therapy Science. 2015;27(4):1019–1022. doi:10.1589/jpts.27.1019. PMID: 25995546. Read it
- Abdalbary SA. Foot mobilization and exercise program combined with toe separator improves outcomes in women with moderate hallux valgus at 1-year follow-up: a randomized clinical trial. Journal of the American Podiatric Medical Association. 2018;108(6):478–486. doi:10.7547/17-026. PMID: 29683337.
Waiting-list control, not a sham. Bundled programme — the separator's own contribution cannot be isolated. - Effects of foot strengthening exercises with or without a toe spacer on hallux alignment, foot mobility, and balance: a randomized controlled trial. Applied Sciences. 2026;16:3163. Read it
Authors to be added. - Krześniak H, Truszczyńska-Baszak A. Toe separators as a therapeutic tool in physiotherapy — a systematic review. Journal of Clinical Medicine. 2024;13(24):7771. doi:10.3390/jcm13247771. PMID: 39768694. Read it
