I have a bunion. What can I do?

Depends. Does it hurt? Are shoes pain or difficult to wear? How does it affect your participation in work and other activities? Treatment could be as simple as wearing wider shoes. Sometimes more supportive shoes and orthotics can lessen pressure on area and prevent progression of deformity. Surgery is the onlty way to actually correct the deformity but not the only way to treat.
Wear shoes that. Accommodate it, or have it surgically removed.