A bunion is a deformity of the joint at the base of the big toe, often characterized by a protrusion of the bone or tissue at the joint. A bunion diagnosis is typically made by a physical examination of the foot and an assessment of symptoms such as pain, redness, and difficulty wearing shoes. X-rays may also be taken to confirm the diagnosis and determine the extent of the bunion. In some cases, additional tests such as MRI or CT scan may be ordered to get a better understanding of the condition. Treatment options for a bunion may include changes to footwear, padding or taping, exercises, and in some cases, surgery.