Do Bunions Grow? How to Stop Them From Getting Worse

Bunions are progressive, meaning they do tend to get worse over time if nothing changes. One retrospective study tracking radiographic measurements found the hallux valgus angle increases at a rate of roughly two-thirds of a degree per year on average, a slow drift that compounds over decades.1PubMed Central. A Retrospective Study Characterizing the Radiographic Progression of Hallux Valgus The good news is that progression is not inevitable at any fixed speed, and several practical steps can slow or stall it.

How Fast Bunions Actually Progress

A bunion is not a growth of new bone in the way a tumor grows. The bump you see is the head of your first metatarsal bone becoming more prominent as the joint drifts out of alignment. Over time, the big toe angles further toward your second toe while the metatarsal shifts in the opposite direction, widening the angle at the joint. Research tracking patients with weight-bearing foot X-rays taken at least two years apart defined meaningful progression as an increase in the hallux valgus angle of five degrees or more during follow-up.2PubMed. Anatomical factors associated with progression of hallux valgus The retrospective radiographic data from another study put the average at about 0.66 degrees per year for the hallux valgus angle and about 0.21 degrees per year for the intermetatarsal angle.1PubMed Central. A Retrospective Study Characterizing the Radiographic Progression of Hallux Valgus

Those numbers sound small, but they add up. Over ten years, an already mild bunion can drift into moderate territory. Over twenty, it can become severe enough to crowd your smaller toes, change the way you walk, and make finding comfortable shoes genuinely difficult. Progression is not linear for everyone, though. Some people’s bunions seem to plateau for years and then accelerate, while others see a steady creep. The pace depends on a mix of anatomy, activity level, body weight, and what you put on your feet every day.

Why Humans Are Prone to Bunions

Bunions are not just a modern footwear problem. Researchers in evolutionary medicine have proposed that when the human foot transitioned from a grasping organ, like the feet of other primates, into a stiff lever for pushing off the ground during walking and running, it created anatomical compromises at the big-toe joint that make bunions possible in the first place.3PubMed Central. Evolutionarily medicine Why do humans get bunions? The first metatarsal bears a disproportionate share of force during each step, and the joint’s design leaves room for the kind of gradual misalignment that shows up as a bunion over years of use.

On top of that evolutionary baseline, several risk factors stack the deck. A cross-sectional study of adults found a hallux valgus prevalence of about 37.5 percent, with the leading risk factors being older age, female sex, and regular heel use.4Pakistan BioMedical Journal. Prevalence and Factors Leading to Hallux Valgus in Adults Genetics play a strong role too. If your parents or grandparents had bunions, your foot shape and joint laxity probably make you more susceptible. But genetics load the gun; lifestyle and footwear pull the trigger.

Footwear Matters More Than You Think

The most dramatic evidence for footwear’s role comes from comparing populations that habitually go barefoot with those that wear shoes. A classic study comparing barefoot and shoe-wearing individuals within the same Chinese population found that the unshod group had a much lower rate of hallux valgus, about 2 percent compared to 33 percent among the shoe-wearing group.5PubMed Central. Footwear Choice and Locomotor Health Throughout the Life Course: A Critical Review The barefoot group also had wider forefeet and thicker, more protective skin on the soles. That comparison alone makes the case that shoes, especially narrow or pointed ones, push the big toe into positions that promote bunion formation.

You do not need to go barefoot full-time to take something from this evidence. The practical takeaway is about toe-box width. Shoes that squeeze your toes together for hours a day are applying a low-grade force in exactly the direction a bunion wants to go. Switching to shoes with a wide, rounded toe box gives your forefoot room to spread naturally. If you already have a bunion, even a mild one, every hour spent in a cramped shoe is working against you. High heels add a second problem by shifting your body weight forward onto the ball of the foot, which increases pressure on the first metatarsal joint. Reducing heel height and choosing shoes that let your toes splay is probably the single most impactful lifestyle change for slowing progression.

Flat Feet and Other Misunderstood Causes

One of the most persistent beliefs about bunions is that flat feet cause them. It seems intuitive: a collapsed arch changes foot mechanics, so surely it strains the big-toe joint. But the evidence does not support this. A study comparing the arch measurements of children with hallux valgus against children without it found no significant difference in arch height between the two groups.6Foot & Ankle International. The significance of pes planus in juvenile hallux valgus Having flat feet may change how you walk, but the arch itself does not appear to drive the bunion deformity.

Another misconception is that a specific muscle structure at the big toe determines whether you will get a bunion. Anatomical research looked at different insertion patterns of the abductor hallucis, the muscle that pulls the big toe inward, in feet with and without hallux valgus. While the proportions of insertion types varied slightly, there was no statistically significant relationship between muscle insertion type and the presence of a bunion.7Wiley Online Library (The Anatomical Record).

Exercises That Target the Big-Toe Joint

If you have a mild to moderate bunion, strengthening the muscles that pull the big toe into proper alignment can help. The exercise with the most research behind it is called the toe-spread-out exercise. You actively try to spread your toes apart, pressing the big toe away from the second toe while keeping the ball of the foot on the ground. It sounds simple, and it is, but studies show it activates the abductor hallucis muscle more effectively than some other common foot exercises.8PubMed. Comparison of muscle activities of abductor hallucis and adductor hallucis between the short foot and toe-spread-out exercises in subjects with mild hallux valgus

A study of people with hallux valgus found that regularly performing the toe-spread-out exercise reduced the hallux valgus angle and increased the cross-sectional area of the abductor hallucis muscle, the muscle that counteracts the bunion’s drift.9PubMed Central. Effect of toe-spread-out exercise on hallux valgus angle and cross-sectional area of abductor hallucis muscle in subjects with hallux valgus A variation of this exercise, done with a pad between the toes, has also been recommended as an effective way to strengthen that muscle in people with mild bunions.10PubMed. Comparison of abductor hallucis muscle activity in subjects with mild hallux valgus during three different foot exercises

The catch is that exercise works best when the deformity is still in its early stages. Once the joint has shifted significantly and the surrounding soft tissues have remodeled, muscle strengthening alone probably will not reverse the angle. Think of these exercises as maintenance and prevention rather than a cure. If you notice a bunion starting, incorporating toe-spread exercises daily is a reasonable first move.

Do Splints and Toe Separators Actually Work?

Night splints and toe separators are among the most commonly marketed non-surgical bunion products. The idea is straightforward: hold the toe in a straighter position long enough, and the joint will stay there. The reality is less encouraging. A comparative study tested both an insole with a built-in toe separator and a night splint in patients with painful hallux valgus. The insole with toe separator significantly reduced pain, which is valuable on its own. However, neither the insole nor the night splint produced a significant improvement in the hallux valgus angle or the intermetatarsal angle.11PubMed. Effects of insole with toe-separator and night splint on patients with painful hallux valgus: a comparative study

So splints and separators can make your foot feel better day to day, and that is not nothing. Reduced pain means more comfortable walking, which means staying more active, which supports overall foot health. But if your goal is to change the angle of the joint, these devices have not been shown to deliver. Wearing a toe separator inside a wide shoe during the day likely offers more comfort benefit than wearing a rigid night splint while you sleep, based on that same study’s findings. If you use them, use them for pain relief rather than as a correction tool, and do not rely on them as a substitute for footwear changes and exercise.

When Surgery Becomes the Answer

For moderate to severe bunions that cause persistent pain, interfere with daily activities, or keep progressing despite conservative measures, surgery is the main option for meaningful correction. More than a hundred surgical procedures have been described for hallux valgus, which gives you a sense of how much the approach depends on the specifics of each person’s deformity. One widely studied procedure, the Lapidus arthrodesis, fuses the joint at the base of the first metatarsal and offers correction in three dimensions, addressing the metatarsal’s rotation, tilt, and sideways drift all at once.12PubMed Central. Surgical Techniques for Lapidus Arthrodesis: Approaches, Indications, and Outcomes

Minimally invasive bunion surgery has also gained attention. A systematic review found that minimally invasive techniques produced higher rates of excellent or good radiographic outcomes compared to traditional open surgery in a pooled analysis involving thousands of patients. However, open techniques appeared to perform better for severe deformities, so the best approach depends partly on how far the bunion has progressed.13PubMed Central. A Multi-Dimensional Systematic Review of Minimally Invasive Bunion Surgery (MIBS) If you are considering surgery, the severity of your bunion and the specific pattern of misalignment matter more than any single technique’s marketing. A surgeon who can match the procedure to your anatomy is more important than the procedure’s brand name.

Recurrence Risk After Surgery

One of the most frustrating aspects of bunion surgery is that the deformity can come back. A systematic review and meta-analysis found that the biggest predictors of recurrence were the postoperative hallux valgus angle and the position of the sesamoid bones, two small bones that sit beneath the big-toe joint.14PubMed Central. Prevalence and Predisposing Factors for Recurrence after Hallux Valgus Surgery In other words, how well the surgery corrected the alignment in the first place strongly influenced whether the bunion crept back.

Separate research put a striking number on the risk: bunions were 28 times more likely to recur when the postoperative hallux valgus angle was eight degrees or larger than when it was corrected below that threshold. Starting with a severe deformity, specifically a preoperative angle of 40 degrees or more, also raised the odds of recurrence significantly.15The Journal of Bone & Joint Surgery. After Bunion Surgery, Immediate X-Rays Predict Recurrence Risk The practical message is that waiting until a bunion is very severe before seeking surgical evaluation can mean a harder correction and a higher chance it comes back. If you are eventually going to need surgery, earlier intervention at a moderate stage may give a better long-term result than waiting for the deformity to become extreme.

Post-surgical footwear and activity habits still matter, too. Surgery corrects the alignment, but the same anatomical tendencies and lifestyle factors that created the bunion in the first place do not disappear. Wearing proper shoes, maintaining foot strength, and following your surgeon’s rehabilitation plan are all part of keeping the correction stable.

How Bunions Affect Daily Life Beyond the Bump

Bunions are sometimes dismissed as a cosmetic issue, but data on quality of life tells a different story. A study examining foot-related quality of life found that people with hallux valgus scored lower across all measured domains, including pain, physical functioning, social functioning, and the ability to wear the footwear they wanted. The relationship between severity and impact was dose-dependent: about a third of people with mild bunions reported foot pain, while that figure rose to more than half in those with severe deformities.16PubMed. Association between hallux valgus pain and foot-related quality of life: The hallux valgus and pain epidemiology study

The footwear limitation is one that rarely shows up in clinical studies but matters enormously to people living with bunions. Choosing shoes becomes a negotiation between comfort and everything else. Social activities that involve standing or walking for extended periods get harder. Over time, the altered gait from favoring one part of the foot can contribute to knee or hip discomfort, though that downstream effect varies widely from person to person. The quality-of-life findings reinforce why slowing progression early is worth the effort. A bunion that stays mild is a minor annoyance; a bunion that becomes severe reshapes your daily routine.

A Practical Checklist for Slowing Progression

If you have been told you have a bunion, or you can see one forming, the strategies for slowing it down are not complicated. They just need to be consistent:

  • Shoe fit: Choose shoes with a wide toe box that lets your toes spread naturally. Avoid pointed toes and keep heel height low. If your everyday shoes squeeze your forefoot at all, they are working against you.
  • Toe exercises: Practice the toe-spread-out exercise daily. Actively spread your toes, pressing the big toe away from the second toe. This strengthens the muscle that opposes the bunion’s direction of drift.
  • Toe separators for comfort: Silicone separators worn during the day in roomy shoes can reduce pain, even though they will not change the underlying angle. Use them as a comfort tool, not a correction tool.
  • Body weight: Extra weight increases the load on the forefoot with every step. Maintaining a healthy weight reduces the mechanical forces driving the deformity.
  • Monitor changes: If you notice the bump getting larger, pain increasing, or the big toe starting to push under or over the second toe, see a foot specialist before the deformity becomes severe. Early evaluation gives you more options.

None of these steps will make an existing bunion disappear. Once bone alignment has shifted, only surgery can move it back. But the goal of conservative management is not reversal. It is slowing the clock enough that the bunion stays in a range where it does not dominate your daily decisions about shoes, activity, and comfort. Given how gradually bunions progress, even modest interventions applied consistently over years can make a meaningful difference in where you end up.