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Overview

Bunions are one of the more serious conditions that can affect foot health. A bunion is actually a bone deformity of the big toe, where the joint at the base and side of the toe is enlarged, forcing the toe out of place. Left untreated, bunions worsen over time. The big toe angles in toward the rest of the toe, and can overlap the third toe (a condition known as Hallux Valgus). Or, it may move toward the second toe and twist or rotate (Hallus Abducto Valgus). Bunions can also lead to deformities like hammertoes. Bunions cause discomfort and pain, because the enlargement constantly rubs against footwear. The skin of the toe becomes red and tender. The larger a bunion grows, the more painful it is to walk. People with bunions can develop thickening skin on the bottom of the foot, bursitis or arthritis, and chronic pain.

Causes
There are many reasons why this deformity occurs such as hereditary factors. Footwear habits. Foot type. Biomechanical factors (pronation). Neuromuscular dysfunction. Ligament Dysfunction (laxity). The most common causative factor is inheriting a foot type from your family that is prone to bunions. Feet that are subjected to pronation also have a higher incidence of attaining HAV deformities. This is a problem that has many causes and more than one may be occurring at the same time.
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
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
Follow the advice given by a Podiatrist. Use felt pads to help keep pressure off the painful area of the bunions. Wear shoes that are wide and deep to accomodate the bunions. Fitting of footwear is very important. Avoid the use of high heel shoes. Use exercises to keep the joint mobile. Night splints may help with the bunion symptoms. The aim of these are to hold the toe in a more correct position. Padding or foam between the big toe and the second toe is sometimes recommended, it should, generally, not be recommended as the big toe is usually so strong it just further 'squeezes' the lesser toes and can lead to problems between these toes. The padding between the two toes will not straighten the big toe. However, sometimes the padding may be needed to help with symptoms that originate inside the joint if the bunion is painful.


Surgical Treatment
In 2010, the National Institute for Health and Care Excellence (NICE) published guidance about a minimally invasive surgical procedure to treat bunions. The aim of the procedure is to repair the tilting of the big toe. The technique can be carried out under a local anaesthetic or a general anaesthetic, using X-rays or an endoscope for guidance. The type of endoscope used will be a long, thin, rigid tube with a light source and video camera at one end. One or more incisions will be made near the big toe so that bone-cutting instruments can be inserted. These will be used to remove the bunion and to divide one or more bones located at the front of the foot. Wires, screws or plates will be used to keep the divided bones in place. After the procedure, you may need to wear a plaster cast or dressing to keep your foot in the correct position until the bones have healed. You may be given a special surgical shoe that enables you to walk on your heel. As the procedure is relatively new, there's little in the way of reliable evidence regarding its safety or effectiveness.