A bunion is a bony bump that forms at the base of your big toe, where the toe meets the foot. It develops when the long bone behind your big toe gradually drifts inward toward the other foot, while the big toe angles outward toward your second toe. Over time, this misalignment pushes the joint out of place, creating a visible bump on the inner edge of your foot. Bunions are one of the most common foot deformities, and they tend to get progressively worse without intervention.
What Happens Inside the Joint
The joint at the base of your big toe is called the first metatarsophalangeal (MTP) joint. In a healthy foot, this joint needs about 65 degrees of upward flexibility to push off the ground normally when you walk. When a bunion forms, the first metatarsal bone drifts toward the midline of your body while the big toe angles in the opposite direction. The tendons that normally keep the toe straight start pulling at the wrong angle, which reinforces the deformity over time.
If your foot is naturally flexible or tends to roll inward (overpronate), the metatarsal is more likely to drift out of alignment. This is why bunions are structural problems, not just surface-level bumps. The visible lump is actually the head of that displaced bone pressing outward against the skin.
Bunion vs. Bunionette
A standard bunion affects the big toe side of your foot. A bunionette, sometimes called a tailor’s bunion, is the same type of deformity but on the opposite side, at the base of your pinky toe. The mechanics are similar, but the treatment approach can differ because of the smaller bones involved.
Causes and Risk Factors
The exact cause of bunions isn’t fully settled, but genetics plays a major role. Many people with bunions have family members with the same condition, and first-degree relatives of someone with a bunion face a higher risk than the general population. What you inherit isn’t the bunion itself but the foot shape, structure, and mechanics that make one more likely to develop.
Tight shoes, high heels, and narrow toe boxes have long been blamed for causing bunions, but the relationship is more nuanced than that. Research suggests poorly fitting shoes probably don’t cause bunions on their own. Instead, they make bunions develop earlier or worsen faster in people who are already predisposed. Other risk factors include rheumatoid arthritis, osteoarthritis, and flat feet.
Common Symptoms
The most obvious sign is a bulging bump on the inner side of your foot at the base of the big toe. But bunions involve more than appearance. Common symptoms include:
- Pain that can be constant or come and go, often worse with walking or standing
- Swelling and redness around the big toe joint
- Stiffness or limited movement in the big toe, sometimes enough to affect your gait
- Corns or calluses where the first and second toes rub together
- Hard skin on the sole of the foot beneath the affected joint
Not all bunions hurt. Some people have a noticeable bump for years without significant pain, while others experience discomfort early on, especially when their shoes press against the joint.
How Severity Is Measured
Doctors classify bunions using X-rays to measure the angle between the big toe and the metatarsal bone. A mild bunion has an angle under 30 degrees. Moderate bunions fall between 30 and 40 degrees. Severe bunions exceed 40 degrees. These measurements help determine which treatments, and which surgical techniques if needed, are appropriate.
What Happens If You Ignore a Bunion
Bunions don’t reverse on their own, and leaving a worsening bunion untreated can lead to secondary problems. As the big toe pushes further into the second toe, it can cause hammertoes, where the smaller toes bend abnormally at the middle joint. The shifting alignment can also pinch nerves in the forefoot (a condition called a neuroma), worsen flat feet, and accelerate arthritis in the affected joint. None of this is inevitable, but it’s why paying attention to a bunion early gives you more options.
Non-Surgical Treatment Options
Conservative treatment won’t reverse a bunion, but it can manage pain and slow progression. Switching to shoes with a wider toe box is the single most practical change you can make. This reduces pressure on the bump and gives your toes room to spread naturally.
Bunion correctors, toe splints, and toe spacers are widely marketed, but the evidence behind them is limited. A 2020 study of 70 people found that wearing a toe splint didn’t change the alignment of the big toe compared to no treatment at all. However, the people using splints did report less pain during walking, running, and at rest. A separate study comparing toe-separating insoles to night splints found pain reduction only in the insole group, with neither group seeing a meaningful change in toe angle. In short, these devices may help you feel more comfortable, but they won’t straighten your toe.
Physical therapy can strengthen the muscles and connective tissue in your foot, which may improve stability and reduce discomfort. Over-the-counter anti-inflammatory pain relievers can help during flare-ups. Custom orthotics provide pain relief for some people, though scientific evidence supporting their use for bunions specifically remains limited.
When Surgery Becomes the Best Option
Surgery is typically considered when pain persists despite conservative treatment, when the bunion makes it difficult to find shoes that fit, or when the deformity is severe enough to limit daily activities. The decision is driven by how much the bunion affects your quality of life, not just its appearance.
Several surgical techniques exist, and your surgeon chooses based on the severity of the deformity and the stability of the joint. Most procedures involve removing the bony prominence and realigning the metatarsal bone, often cutting the bone and repositioning it (an osteotomy). For more severe bunions, or when the joint at the base of the metatarsal is unstable, a procedure called a Lapidus fusion may be used. This involves fusing the joint where the metatarsal meets the midfoot bones, correcting the alignment at its source and securing it with screws or a plate. This approach addresses both the visible bump and the underlying instability that caused it.
What Recovery Looks Like
Initial healing from bunion surgery takes about six weeks, with full recovery stretching to several months. You’ll wear a cast or a special surgical shoe for three to six weeks after the procedure, and you can expect to stay off your foot entirely for two to six weeks before gradually starting to bear weight.
If you work a desk job, most people return within two to three weeks. Jobs involving light physical activity require four to six weeks off, while heavy manual labor typically means six to eight weeks or longer. Driving is usually off-limits for two to six weeks, depending on which foot was operated on and when you stop taking pain medication.
Getting back to sports and high-impact exercise takes the longest. Most surgeons clear patients for these activities around 10 to 12 weeks, though a full return to pre-surgery performance levels can take three to six months. Swelling in the foot often lingers well beyond the point when you feel otherwise recovered, which is normal.