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Overview

A bunion is a bone deformity caused by an enlargement of the joint at the base and side of the big toe ( metatarsophalangeal joint ). Bunions form when the toe moves out of place. The enlargement and its protuberance cause friction and pressure as they rub against footwear. The growing enlargement or protuberance then causes more irritation or inflammation. In some cases, the big toe moves toward the second toe and rotates or twists, which is known as Hallux Abducto Valgus. Bunions can also lead to other toe deformities, such as hammertoe.

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.
SymptomsThe major symptom of bunions is a hard bump on the outside edge of the foot or at the base of the big toe. Redness, pain and swelling surrounding or at the MTP joint can also occur.

Diagnosis
People with bunions may be concerned about the changing appearance of their feet, but it is usually the pain caused by the condition that leads them to consult their doctor. The doctor will evaluate any symptoms experienced and examine the affected foot for joint enlargement, tissue swelling and/or tenderness. They will also assess any risk factors for the condition and will ask about family history. An x-ray of the foot is usually recommended so that the alignment of big toe joint can be assessed. This would also allow any other conditions that may be affecting the joint, such as arthritis, to be seen.

Non Surgical Treatment
The treatment method your doctor chooses for you will be based on the severity of the bunion. Treatment can be simple and non-surgical or it can be complex, surgical, and costly. A bunion is permanent unless surgery is performed to remove it, but self-care can help to improve your symptoms. If you suspect that a bunion is developing, you should seek medical attention immediately. Here are the most common conservative treatment options. Changing your shoes. Adding custom orthotics to your shoes. Medication such as Tylenol for pain relief. Padding and taping to put your foot in its normal position. Applying ice or cold compresses to reduce swelling and pain. Keeping pressure off your affected toe, especially if there is swelling, redness, and pain. Before bed, separate the affected toe from the others with a foam-rubber pad and leave it there while you sleep.


Surgical Treatment
Surgery is a last option for those with advanced and painful bunions that do not respond to any other treatment. The surgical operation to correct the deformity from a bunion is called a bunionectomy, which typically involves removing bony growth of the bunion, re-positioning ligaments and tendons, and realigning the bones of the toe joint. Surgery is usually a day procedure performed with a local anaesthetic. The bones may be stabilised in their new position with screws or pins. Hardware may even include absorbable pins that are broken down by the body after a few months. You can expect a 6 - 8 week recovery period during which crutches are usually required. Surgery is often successful but sometimes the big toe moves back to its previous deviated position. Proper footwear and orthotics reduces the chances of surgical failure.

Prevention
Choosing footwear that fits correctly, especially low heeled shoes with plenty of space for the toes, is one of the main ways that bunions can be prevented. Always stand when trying on shoes to ensure they still fit comfortably when the foot expands under your body weight. Try shoes on both feet, and select the size appropriate for your larger foot. Use an extra insole if one shoe is looser than the other. Do not cramp the larger foot. People prone to flat-footedness should consider the use of arch supports, orthotic shoe inserts or special orthotic shoes to prevent or delay the development of bunions.