A bunion is a bony protrusion that develops at the base of the big toe, and is caused by the misalignment of the bones in the foot. Bunions can be caused by a variety of factors, including genetics, ill-fitting shoes, and arthritis. Treatment options for bunions include wearing shoes that fit properly, using orthotic inserts, and in severe cases, surgery may be necessary. Physical therapy and non-steroidal anti-inflammatory drugs (NSAIDs) may also be used to relieve pain associated with bunions. Your doctor is the best source of information about treatment options and the best course of action for your specific case.