What causes bunions
Bunions rarely have a single cause. They develop from a combination of factors, and which ones matter most differs from person to person:
- Inherited foot structure and family history
- Foot biomechanics, such as excessive pronation or a flat, flexible foot that shifts load onto the big toe
- Muscle and tendon imbalance around the big toe joint that gradually pulls the toe out of line
- Instability of the midfoot and hindfoot, either congenital or acquired (for example after injury or from loose ligaments), including excess motion at the joint at the base of the first metatarsal
- A tight calf muscle (equinus), which increases stress on the front of the foot
- Footwear, which seldom causes a bunion by itself but can make one more painful and progress faster
- Inflammatory arthritis and some neuromuscular conditions
Because the causes vary, two bunions that look alike can call for different treatment. That is why evaluation looks beyond the big toe at the alignment and mechanics of the whole foot and ankle.
Common symptoms
- A visible bump on the inside of the foot at the base of the big toe
- Redness, swelling or soreness over the bump
- Pain with walking, exercise or shoes
- A big toe that angles toward, or overlaps, the second toe
- Calluses where the toes rub together
- Stiffness or limited motion in the big toe joint
Non-surgical treatment
Many people get meaningful relief without surgery, especially early on. Options include:
- Shoes with a wide toe box and low heel
- Padding or toe spacers to reduce friction and pressure
- Orthotics to support the arch and improve foot mechanics
- Activity changes, ice, and anti-inflammatory medication when appropriate for you
These measures can ease symptoms but do not straighten the toe.
When surgery is considered
Surgery is generally considered when pain continues despite good non-surgical care, when the bunion limits walking or sports, or when the deformity keeps progressing. It is not recommended for cosmetic reasons alone. Bunion surgery (bunionectomy) corrects the alignment of the big toe joint, typically by repositioning bone and balancing the soft tissues around the joint. The right procedure depends on the size of the bunion, the shape of your foot and the condition of the joint, so there is no single operation that fits every bunion. When the underlying problem is instability or a flat, flexible foot, the plan may also address that, for example by stabilizing the joint at the base of the first metatarsal or correcting alignment elsewhere in the foot, rather than only removing the bump, so the correction is more likely to last.
What to expect at your visit
A first visit typically includes a review of your symptoms and history, an examination of the foot and ankle (often including how you stand and walk), and imaging such as X-rays when needed. Dr. Ajdari will explain your options, including non-surgical care, so the two of you can choose a plan that fits your goals.
This page is for general education and is not a substitute for an examination and advice from a qualified clinician. Treatment recommendations depend on your individual situation. If you think you may have a medical emergency, call 911.