Bunion surgery works by cutting and realigning the bones in your foot to straighten the big toe joint. The exact technique depends on how severe your bunion is, but the core idea is the same: a surgeon repositions the first metatarsal (the long bone behind your big toe) and sometimes shaves off the bony bump, then holds everything in place with screws or plates while it heals. Most procedures take about an hour, and you go home the same day.
How Surgeons Decide Which Technique to Use
Bunions are classified by measuring the angles between the bones on an X-ray. A normal big toe angles less than 15 degrees toward the other toes. Once that angle exceeds 20 to 30 degrees and conservative treatments like wider shoes or orthotics haven’t helped, surgery becomes an option. The severity breaks down into three tiers that guide the approach:
- Mild: The big toe angle is under 30 degrees, and the spread between the first and second metatarsals is under 13 degrees.
- Moderate: The big toe angle is 30 to 40 degrees, with a metatarsal spread of 13 to 20 degrees.
- Severe: The big toe angle exceeds 40 degrees, with a metatarsal spread over 20 degrees.
Mild bunions typically need a smaller bone correction near the toe joint. Severe bunions often require a more involved procedure higher up the foot, sometimes fusing a joint entirely to prevent the problem from returning.
The Main Types of Bunion Surgery
There are over 150 described surgical procedures for bunions, but they fall into a few core categories.
Osteotomy
This is the most common approach. The surgeon makes small cuts in the bone of the first metatarsal, shifts the bone into a straighter position, then locks it in place with screws or pins. For mild bunions, the cut is made near the head of the bone (close to the toe joint). For moderate bunions, it’s made in the middle of the bone, which allows for a larger correction. An additional cut in the big toe bone itself, called an Akin osteotomy, is sometimes added. This involves removing a small wedge of bone from the toe to fine-tune its alignment.
Lapidus Fusion
For large bunions or cases where the joint at the base of the metatarsal is unstable or arthritic, surgeons fuse the first metatarsal to the small bone it connects to near the midfoot (the medial cuneiform). The surgeon removes the bunion, strips the cartilage from the joint surfaces, and secures the two bones together with screws or plates. Over several weeks, the bones grow together into one solid piece. This eliminates the instability that caused the bunion in the first place, which is why it’s often chosen for severe deformities or recurrent bunions.
Exostectomy
This is the simplest procedure. The surgeon shaves off the bony bump without cutting or realigning the metatarsal. On its own, an exostectomy doesn’t correct the underlying misalignment, so it’s almost always done alongside an osteotomy. Used alone, the bunion is likely to return.
What Happens During the Procedure
Bunion surgery is typically an outpatient procedure, meaning you arrive and leave the same day. Before surgery, you’ll be asked to stop blood-thinning medications like aspirin and ibuprofen about a week beforehand. If you smoke, your surgeon will strongly encourage you to stop, since smoking slows both wound and bone healing significantly.
For anesthesia, you have several options. Many bunion surgeries are done under local or regional anesthesia, where your foot or lower leg is numbed but you stay awake (sometimes with a sedative to keep you relaxed). A spinal block numbs everything below the waist. General anesthesia, where you’re fully asleep, is also an option, though it’s less commonly needed for a procedure this size.
In a traditional open osteotomy, the surgeon makes an incision along the inside of the foot near the big toe joint, typically a few centimeters long. They move soft tissue aside to expose the bone, use a small saw to cut through the metatarsal at a precise angle, then shift the bone fragment into the corrected position. Screws, pins, or a small plate are placed to hold the bone while it heals. The incision is closed with stitches, and the foot is wrapped in a firm dressing or splint.
Minimally Invasive Bunion Surgery
A newer approach uses much smaller incisions, sometimes just a few millimeters long. Instead of opening the foot up widely, the surgeon works through tiny stab incisions using a specialized high-torque, low-speed burr to cut the bone. They watch the bone on a live X-ray screen (fluoroscopy) throughout the procedure to guide every cut and confirm alignment.
After cutting through the metatarsal, the surgeon shifts the bone head into position and slides a guide wire through to hold it temporarily. Screws are then placed over the wire to fix the bone permanently. If a toe bone correction is needed, the same burr-and-screw technique is used through a separate tiny incision. The foot is wrapped in a special spica bandage to maintain alignment.
The appeal of minimally invasive surgery is practical: patients consistently report less pain in the early days after surgery compared to open procedures. The smaller incisions also mean less visible scarring and potentially a shorter initial recovery window. That said, the technique requires specialized equipment and experience with fluoroscopy, so it’s not available everywhere.
Hardware That Stays in Your Foot
The screws and plates used in bunion surgery are made from either stainless steel or titanium alloys. Neither material has a clear advantage over the other unless you have a known metal allergy. These implants are designed to be permanent and don’t typically need to be removed. In most cases, you won’t feel them once healing is complete. Some newer implants use biocompatible plastics or composite materials, though metal remains the standard.
Recovery: What to Expect Week by Week
Recovery from bunion surgery is slower than many people anticipate, and it varies depending on the type of procedure. In the first days, your foot will be swollen and bandaged. Keeping it elevated is critical to manage swelling and pain.
You won’t be able to bear weight on the foot right away. You’ll need crutches, a knee scooter, or a surgical boot for at least 3 to 6 weeks. For more involved procedures like a Lapidus fusion, a cast or protective boot may be necessary for several months while the bones fully fuse. Heavy lifting is off-limits for 3 to 8 weeks depending on the surgery type.
Most people transition back into supportive shoes somewhere between 6 and 12 weeks. Full recovery, meaning you can return to all activities including running or high-impact exercise, often takes 3 to 6 months. Swelling can persist even longer. It’s not unusual for mild swelling to linger for 6 to 12 months, even when everything has healed properly.
Risks and Possible Complications
Bunion surgery is generally safe, but like any bone surgery, it carries real risks. The most common issues are stiffness in the big toe joint, swelling that lasts longer than expected, and numbness around the incision from minor nerve irritation during surgery. Infection and delayed bone healing are less common but possible.
More significant complications include nerve damage that causes lasting numbness or tingling, overcorrection where the big toe drifts away from the other toes instead of toward them, and recurrence of the bunion over time. Continued pain after surgery, while not the norm, does happen.
How Satisfied Are Patients With the Results?
About two-thirds of patients report being very pleased with their bunion surgery outcome. That’s an encouraging majority, but it also means roughly 25 to 33 percent of patients are dissatisfied to some degree. Dissatisfaction doesn’t always mean the surgery failed. It can reflect unrealistic expectations about how quickly the foot would heal, residual stiffness, or lingering discomfort during certain activities. Understanding that recovery is measured in months, not weeks, and that some joint stiffness may be permanent, helps set realistic expectations before you commit to the procedure.