A bunion is a bony protrusion on the side of the big toe or in some less common cases on the outside of the small toe. The protrusion at the joint of the base of the toe can become irritated, swollen and painful. As the protrusion becomes larger the toe bends toward the second toe causing further sources of irritation. There appears to be multiple causes of a bunion. Genetically the foot may be shaped such that normal activity puts excessive pressure on the big toe eventually causing a bunion. Some suggest footwear that does not fit properly may also put excessive pressure and cause a bunion. The protrusion may be excessive bone structure or a fluid sac called the bursa that becomes inflamed. In any case the deformity of the toe makes it difficult to find proper fitting footwear, is not a pleasant sight, and can be very painful. Causes
It is thought that the primary cause of bunions is a mechanical instability in the big toe joint. There are a number of different reasons as to why this may happen. Bunions tend to run in families so a person with a family history of bunions has an increased risk of developing them. Factors that are known to increase the risk of bunions include wearing improperly fitting shoes (particularly narrow and/or high-heeled shoes). Certain arthritic conditions and ligament disorders. Age (the incidence of bunions increases with age). Being flatfooted with feet that roll inwards (over pronation). Past injury (trauma) to the foot. Nerve conditions affecting the foot. Bunions most commonly affect women (approximately 90% of cases) and are less common in people who do not regularly wear shoes.
Symptoms
In addition to the typical bump, signs of bunions can include red, calloused skin along the foot at the base of the big toe. With bunions, you may also develop calluses on the big toe, sores between the toes, ingrown toenail, and restricted motion of the toe. Some bunions are small and painless and some are large and extremely painful. Pressure from shoes worsens the problem.
Diagnosis
Your doctor will be able to diagnose a bunion by asking about your symptoms and examining your feet. You may also have blood tests to rule out any other medical conditions, such as rheumatoid arthritis or gout, although this is rare. Your doctor may refer you to a podiatrist or chiropodist (healthcare professionals who specialise in conditions that affect the feet).
Non Surgical Treatment
Custom orthoses or over-the-counter insoles to aid big toe joint function, help control over-pronation and maintain proper alignment of the bones in the feet. Properly sized, supportive footwear that are torsionally stable (can?t be folded or twisted easily) and that feature a good ?rocker profile? (curved from the ball to tips of the toes) help to reduce stress on the joint when walking. Footwear modifications to expand the area of the shoe surrounding the bunion to relieve pressure. Physical therapy modalities include rest, icing and massage. Injections, surgery and other treatment options, please consult your medical doctor for information and/or referral to a podiatrist or other foot and ankle specialist.
Surgical Treatment
Bunion surgery is most often a day case or one night in hospital. Surgery can be done under ankle block (patient awake) or general anaesthetic. It is best to rest with the foot elevated for the first 2 weeks after surgery. The foot is bandaged and a special sandal supplied by the hospital is worn for 6 weeks. Sensible shoes are to be worn for a further 6 weeks after the bandages are removed. It will take between 3-6 months for the swelling to go down. It will take 12 months before everything completely settles. It is also important to remember that not all bunion operations are entirely successful.