Foot Bunions Causes

Overview

A Bunion is one of the most common foot ailments which usually occur near the joint at the base of the big toe. It is actually a bony protrusion which consists of excess or misaligned bone in the joint. Although they may develop on the fifth or little toe, bunions usually occur at the base of the big toe. In addition to causing pain, a bunion changes the shape of your foot, making it harder to find shoes that fit. The good news however, is that you don?t have to hobble for the rest of your life, bunions can be treated.

Causes
The most common cause of bunions is poor footwear. Poorly fitted shoes, high heeled shoes or shoes with a narrow toe area can all cause bunions or make bunions worse. Bunions can be hereditary and they can be associated with poor foot biomechanics such as overpronation or flat feet. Rheumatoid arthritis or some diseases of the nervous system can also cause bunions.
SymptomsMost patients complain of pain directly on the bunion area, within the big toe joint, and/or on the bottom of the foot. The bunion may become irritated, red, warm, swollen and/or callused. The pain may be dull and mild or severe and sharp. The size of the bunion doesn?t necessarily result in more pain. Pain is often made worse by shoes, especially shoes that crowd the toes. While some bunions may result in significant pain, other bunions may not be painful at all.

Diagnosis
Diagnosis begins with a careful history and physical examination by your doctor. This will usually include a discussion about shoe wear and the importance of shoes in the development and treatment of the condition. X-rays will probably be suggested. This allows your doctor to measure several important angles made by the bones of the feet to help determine the appropriate treatment.

Non Surgical Treatment
Initial treatment of bunions may include wearing comfortable, well-fitting footwear (particularly shoes that conform to the shape of the foot and do not cause pressure areas) or the use of splints and orthotics (special shoe inserts shaped to your feet) to reposition the big toe. For bunions caused by arthritis, medications may help reduce pain and swelling. If nonsurgical treatment fails, your doctor may suggest surgery, which resolves the problem in nearly all persons. The goal of surgery is to relieve pain and correct as much deformity as possible. The surgery is not cosmetic and is not meant to improve the appearance of the foot. Other related procedures that may be used to help diagnose foot disorders include X-rays of the bone and foot.


Surgical Treatment
When a surgeon cuts and repositions a bone, it is referred to as an osteotomy. There are two basic techniques used to perform an osteotomy to realign the first metatarsal. In some cases, the far end of the bone is cut and moved laterally (called a distal osteotomy). This effectively reduces the angle between the first and second metatarsal bones. This type of procedure usually requires one or two small incisions in the foot. Once the surgeon is satisfied with the position of the bones, the osteotomy is held in the desired position with one, or several, metal pins. Once the bone heals, the pin is removed. The metal pins are usually removed between three and six weeks following surgery. In other situations, the first metatarsal is cut at the near end of the bone (called a proximal osteotomy). This type of procedure usually requires two or three small incisions in the foot. Once the skin is opened the surgeon performs the osteotomy. The bone is then realigned and held in place with metal pins until it heals. Again, this reduces the angle between the first and second metatarsal bones. Realignment of the big toe is then done by releasing the tight structures on the lateral, or outer, side of the first MTP joint. This includes the tight joint capsule and the tendon of the adductor hallucis muscle. This muscle tends to pull the big toe inward. By releasing the tendon, the toe is no longer pulled out of alignment. The toe is realigned and the joint capsule on the side of the big toe closest to the other toe is tightened to keep the toe straight, or balanced. Once the surgeon is satisfied that the toe is straight and well balanced, the skin incisions are closed with small stitches. A bulky bandage is applied to the foot before you are returned to the recovery room.

Prevention
The best way to reduce your chances of developing bunions is to wear shoes that fit properly. Shoes that are too tight or have high heels can force your toes together. Bunions are rare in populations that don?t wear shoes. Make sure your shoes are the correct size and that there's enough room to move your toes freely. It's best to avoid wearing shoes with high heels or pointy toes.