A hallux abducto valgus deformity, commonly called a bunion, is a deformity characterized by medial deviation of the great toe, often erroneously described as an enlargement of bone or tissue around the joint at the head of the big toe. There is disagreement among medical professionals about the cause of bunions; some see them as primarily caused by the long-term use of shoes, particularly tight-fitting shoes with pointed toes, while others believe that the problem stems from genetic factors that are exacerbated by shoe use. Bunions occur when pressure is applied to the side of the big toe (hallux) forcing it inwards towards, and sometimes under or over, the other toes (angulation). As pressure is applied, the tissues surrounding the joint may become swollen and tender. In a survey of people from cultures that do not wear shoes, no cases of bunions were found, lending credence to the hypothesis that bunions are caused by ill-fitting shoes. The bump itself is partly due to the swollen bursal sac or an osseous (bony) anomaly on the metatarsophalangeal joint. The larger part of the bump is a normal part of the head of the first metatarsal bone that has tilted sideways to stick out at its top.
Prolonged pressure against the inside portion of the 1st MTP joint can lead to Bunions. This most commonly occurs as a result of wearing pointed toe shoes or shoes that are too tight. Another cause is over-pronation. Normal ?toe-off?occurs from bottom of the big toe. Over-pronation can cause one to ?toe-off? on the inside portion of the big toe versus the bottom. Over time, there is a retrograde force into the joint which pushes it out stretches the joint capsule. This tearing and stretching of the joint capsule as well as the wear and tear on the cartilage is what causes the pain.
Movement of the big toe towards the smaller toes. Bulging bump on the outside of the base of the big toe. Restricted movement of the big toe. Swelling, inflammation, redness or soreness around your big toe joint. Persistent or sporadic dull, sharp or aching pain in or around the big toe. Corns, blisters and calluses which can develop when the first and second toes overlap. Over time, more severe symptoms can occur such as arthritis of the big toe, stress fractures and problems walking.
Your doctor can identify a bunion by examining your foot. Watching your big toe as you move it up and down will help your doctor determine if your range of motion is limited. Your doctor will also look for redness or swelling. After the physical exam, an X-ray of your foot can help your doctor identify the cause of the bunion and rate its severity.
Non Surgical Treatment
Some bunions can be treated without surgery. If you have a bunion, wear shoes that are roomy enough so that they won?t put pressure on it. You can choose to have your shoes stretched out professionally or try cushioning the painful area with protective pads. Orthotics have been shown to help prevent progression of bunions. Oral nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, may be recommended to reduce pain and inflammation. Applying an ice pack several times a day can also help reduce inflammation and pain. If your bunion progresses to a point where you have difficulty walking or experience pain even with accommodative shoes, surgery may be necessary.
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.
Wear insoles and well-fitting shoes to help slow down the progression of bunions and alleviate discomfort. Cushioning can also help alleviate discomfort. Consider wearing shoes with a wide toe box so they don't crowd your toes. Children can also develop bunions and should wear properly fitting shoes as their feet are still developing.