Bunions are a common foot deformity that can cause pain, swelling, and difficulty walking. While they are more likely to affect women than men, anyone can develop a bunion. Bunions are caused by a genetic predisposition, but they can also be aggravated by wearing ill-fitting shoes or engaging in activities that put stress on the feet. While there is no cure for bunions, there are a number of treatments that can help to relieve pain and improve function. In some cases, surgery may be necessary.