CarminaEachoのブログ

Overview

A bunion is a deformity of the metatarsophalangeal (MTP) joint at the base of the big toe. A bunion develops when the first metatarsal bone of the foot turns outward and the big toe points inward (toward the other toes), causing the joint to jut out. A bunion is most likely to develop when susceptible feet are repeatedly squeezed into narrow, pointed-toe footwear. The big toe pushes against the other toes, sometimes diving over or under them. As a result, the base of the big toe ? the metatarsophalangeal (MTP) joint ? juts or angles out from the foot.

Causes
Bunions can be caused by the following factors. Hereditary (especially via the female line). Rolling in (pronation) of the feet. Walking with turned out feet. Weakness of muscles controlling the big toe. Weakness of intrinsic muscles of the feet. Leaning on the big toe in a tendu, especially to second or derri?re. Reduced mobility of the big toe when on demi-pointe. Restricted pointe range.
SymptomsPain in the toe joint and surrounding area. Painful to touch or press, and when walking. Growth of a bony lump (exostosis) at the side of the big toe joint. Irritated skin around the bunion. Redness. Thickening of overlying skin. Blisters may form more easily. Deformed bones, joints and ligaments as the big toe shifts towards the other toes. As the big toe shifts, its base becomes more prominent, forming the bunion. Eventually the big toe is forced to lie over, or more commonly under, the second toe. The second toe of patients who have bunions commonly forms a hammer toe. Trouble with shoes. It is difficult to find shoes that fit properly. Bunions may force you to buy a larger size shoe to accommodate the width the bunion creates. Eventually it hurts to wear any shoe, or even walk barefoot.

Diagnosis
The doctor considers a bunion as a possible diagnosis when noting the symptoms described above. The anatomy of the foot, including joint and foot function, is assessed during the examination. Radiographs (X-ray films) of the foot can be helpful to determine the integrity of the joints of the foot and to screen for underlying conditions, such as arthritis or gout. X-ray films are an excellent method of calculating the alignment of the toes when taken in a standing position.

Non Surgical Treatment
Bunions can be treated conservatively (without surgery) using simple measures such as well-fitting shoes, orthoses simple painkillers and padding. Physiotherapy can help improve associated muscle imbalances. Such measures will not correct or even stop the deformity but they can help with symptoms. When non-surgical treatments prove insufficient, surgery can relieve your pain, correct any related foot deformity and help you resume your normal activities.


Surgical Treatment
If the conservative options fail, your doctor will determine the best surgical procedure based on the severity of your condition. The most common surgical procedure is a bunionectomy, which includes removing swollen tissue from around your big toe joint. Removing part of the bone to straighten your big toe. Realigning the metatarsal bone to reduce angular deformity. Joining the bones in a corrected position to permanently correct the deformity. Most people can get up and walk around the day after bunion surgery, but full recovery can occasionally take up to eight weeks or more. Doctors stress the importance of wearing proper shoes, especially after treatment, to prevent recurrence. If you are at higher risk or prone to bunions, you may not be able to avoid recurrence.