A bunion is a bony protrusion that forms on the base of the big toe, it's also known as hallux valgus. This condition is caused by a displacement of the bone and can lead to pain, redness, and swelling in the area. The term bunion comes from the Latin word "bunion," which means "swelling." It is a common foot condition that affects many people, particularly women. It can be caused by a variety of factors, such as genetics, ill-fitting shoes, and certain medical conditions. It is important to seek treatment for a bunion as it can lead to difficulty in walking, standing and it can also cause complications such as arthritis.