The common bunion is a localized area of enlargement of the inner portion of the joint at the base of the big toe. The enlargement actually represents a misalignment of the big toe joint (metatarsal phalangeal joint) and, in some cases, additional bone formation. The misalignment causes the big toe to point outward (medically termed hallux valgus deformity) toward the smaller toes. This deformity is progressive and will increase with time. The enlarged joint at the base of the big toe (the first metatarsophalangeal joint, or MTP joint) can become inflamed with redness, tenderness, and pain. A small fluid-filled sac (bursa) adjacent to the joint can also become inflamed (bursitis), leading to additional swelling, redness, and pain. A more deep joint pain may occur as localized arthritis develops in later stages of the deformity. A less common bunion is located at the joint at the base of the smallest (fifth) toe. This bunion is sometimes referred to as a tailor's bunion or bunionette.
No one single cause has been proven. There are a number of causes, and though shoes can exacerbate the problem, bunions do occur in societies that don?t wear them. We walk on the same type of ground all the time, whereas the human foot was actually designed to adapt to varying terrains. In a sense, a bunion is a type of repetitive strain injury. And like repetitive strain injury, some people are more prone to it than others. One theory, though it remains unproven, is that bunions are caused by one or both of the following. Because the foot wasn?t designed to constantly walk on a level surface, the ball of the big toe is slightly lower than the ball of the rest of your foot. When your foot meets the ground, the ball of the big toe is pushed up, and the big toe joint can?t bend as well as it was designed to. In order for the big toe joint to bend fully as you walk, your foot rolls slightly over to the side (this is also why people with hallux valgus often get hard skin). Also, if your midtarsal joint tends to move from side to side more than it does up and down, the arch in your foot collapses as your foot rolls in. This also makes you more prone to developing bunions. Such problems can be exacerbated by tight footwear. Slip-on shoes can make matters worse. Because they have to be tighter to stay on your feet, you automatically have less room for your toes. And with nothing to hold your foot in place, your toes often slide to the end where they?re exposed to lots of pressure. Likewise, high heels throw more weight onto the ball of the foot, putting your toes under further pressure. If you haven?t got a bunion by adulthood and you later develop one, there could be some underlying arthritis.
Corns and calluses may occur on the soles of the feet, in between toes and on the bunion joint. Stiffness can occur at the big toe due to secondary arthritis, this is known as Hallux Rigidus. Other foot conditions can occur such as in growing toenails and in severe cases the bunion joint may have a fluid filled sack called a bursitis. This can be very painful and can become infected.
Most patients are diagnosed to have bunions from clinical history and examination. However, in some cases, X-rays will be performed to determine the extent of damage to the joint. Furthermore, it will enable the treating doctor to decide on the best course of management of the patient.
Non Surgical Treatment
Many people with bunions are quite comfortable if they wear wide, well fitting shoes and give them time to adapt to the shape of their feet. A small pad over the bony prominence, which can be bought from a chemist or chiropodist, can take the pressure of the shoe off the bunion. High heels tend to squeeze the foot into the front of the shoe and should be avoided. It is often worthwhile seeing a chiropodist if these simple measures are not quite enough.
Procedures can range from shaving off excess bone to restructuring and fusing the big toe. For mild conditions, you may simply need the connective tissues holding your big toe to be tightened so they hold the digit in the correct position. More advanced bunions will need more manipulation and involved remedies. Cuts in the bone tissue can help our specialists realign the toe. You may need to have the damaged portion of the joint removed. In severe cases, the joint may be fused to prevent it from moving out of position again. If your bunion created other foot complications, like hammertoes, our specialists may correct those during the procedure as well.