A bunion is a deviation and inflammation of the joint where the big toe connects to the 1st metatarsal, also known as the 1st MTP. The capsule of the joint is displaced, thickened, and enlarged, and the cartilage of the joint is damaged. There are three degrees of bunions: mild, moderate, and severe. It is important to know that bunions are not hereditary, although the tendency to overpronate, which is one of the main causes of bunions, has a hereditary component.

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