What Are Bunions

Overview

A bunion is a painful deformity of the joint where the bones of the foot and the big toe meet. The enlargement of the bone and tissue around this joint is known as a bunion or hallux valgus. Symptoms of a bunion include a swollen bursal sac, a bony deformity on the side of the great toe joint, tender and swollen tissues surrounding the deformity, and displacement of the big toe, which may turn inward.

Causes
Bunions are most often caused by an inherited faulty mechanical structure of the foot. This faulty structure causes the drifting of the great toe and the bone to become prominent on the side of the foot. The skin then gets pinches by this bony prominence and the shoe. Therefore in most cases bunions are not caused by tight shoes but are made more painful by tight shoes. End stage bunions may become painful both in and out of shoes.
SymptomsBunions or hallux valgus tend to give pain predominantly from the metatarsal head on the inner border of the foot. The bunion tends to be painful mainly when in enclosed shoes and so is often more symptomatic in winter. As the front part of the foot splays and the great toe moves across towards the 2nd toe a bunion can also produce pain from the 2nd toe itself. The pain which a bunion produces on the 2nd toe is either due to direct rubbing between the great toe and the 2nd toe, a hammer toe type deformity produced due to crowding of the 2nd toe by the bunion and the 3rd toe.The hammer toe will either be painful from its top aspect where it rubs directly on shoe wear or its under surface in the area of the 2nd metatarsal head. This is made prominent and pushed to the sole of the foot by the 2nd toe rising upwards and driving the metatarsal head downwards.

Diagnosis
A doctor can very often diagnose a bunion by looking at it. A foot x-ray can show an abnormal angle between the big toe and the foot. In some cases, arthritis may also be seen.

Non Surgical Treatment
Bunion pain can be successfully managed in the vast majority of cases by switching to shoes that fit properly and don't compress the toes. Your orthopaedic surgeon can give you more information about proper shoe fit and the types of shoes that would be best for you. Follow these general points of shoe fit. Do not select shoes by the size marked inside the shoe. Sizes vary among shoe brands and styles. Judge the shoe by how it fits on your foot. Select a shoe that conforms as nearly as possible to the shape of your foot. Have your feet measured regularly. The size of your feet change as you grow older. Have both feet measured. Most people have one foot larger than the other. Fit to the largest foot. Fit at the end of the day when your feet are the largest. Stand during the fitting process and check that there is adequate space (3/8" to 1/2") for your longest toe at the end of each shoe. Make sure the ball of your foot fits well into the widest part (ball pocket) of the shoe. Do not purchase shoes that feel too tight, expecting them to "stretch" to fit. Your heel should fit comfortably in the shoe with a minimum amount of slippage. Walk in the shoe to make sure it fits and feels right. (Fashionable shoes can be comfortable.) Some shoes can be modified by stretching the areas that put pressure on your toes. Splints to reposition the big toe and orthotics (special shoe inserts shaped to your feet) also may relieve pain. For bunions caused by arthritis, medications can be prescribed to reduce pain and swelling.


Surgical Treatment
In severe hallux valgus bunion cases, the first long bone (metatarsal) in the foot dramatically shifts away from the second metatarsal, resulting in looseness and a large deformity. In severe bunion corrections, a surgery known as the Lapidus procedure realigns the first metatarsal into its natural position. Using screws, the surgery holds the bone stable so it does not shift again and reduces the change of the bunion returning to basically none. Surgery may also involve removing the enlarged portion of the bunion region, cutting and realigning the bone, and correcting the position of the tendons and ligaments. By using a special plate with Lapidus procedures, University Foot and Ankle Institute patients are able to put weight on their foot after only 2-3 weeks, rather than the typical 6-8 weeks of no weight.

Prevention
There are some steps that may help prevent, or at least slow, the progression of bunions. Avoid shoes with a narrow toe box. If your foot flattens excessively, make sure you wear supportive shoes, and if necessary, get custom orthotics from your podiatrist. See your podiatrist at the first signs or symptoms of a bunion deformity, as early treatment may stop or slow its progression.