A bunion is a bone deformity caused by an enlargement of the joint at the base and side of the big toe (metatarsophalangeal joint).
Bunions form when the toe moves out of place. The enlargement and its protuberance cause friction and pressure as they rub against footwear. Over time, the movement of the big toe angles in toward the other toes, sometimes overlapping a third toe (known as Hallux Varus). The growing enlargement or protuberance then causes more irritation or inflammation. In some cases, the big toe moves toward the second toe and rotates or twists, which is known as Hallus Abducto Varus. Bunions can also lead to other toe deformities, such as hammertoe.
Many people with bunions suffer from discomfort and pain from the constant irritation, rubbing, and friction of the enlargement against shoes. The skin over the toe becomes red and tender. Because this joint flexes with every step, the bigger the bunion gets, the more it hurts to walk. Over time, bursitis or arthritis may set in, the skin on the bottom of the foot may become thicker, and everyday walking may become difficult—all contributing to chronic pain.
Wearing shoes that are too tight is the leading cause of bunions. Bunions are not hereditary, but they do tend to run in families, usually because of a faulty foot structure. Foot injuries, neuromuscular problems, flat feet, and pronated feet can contribute to their formation. It is estimated that bunions occur in 33 percent of the population in Western countries.
Treatment for Bunions
Because they are bone deformities, bunions do not resolve by themselves. The goal for bunion treatment is twofold: first, to relieve the pressure and pain caused by irritations, and second to stop any progressive growth of the enlargement. Commonly used methods for reducing pressure and pain caused by bunions include:
- Protective padding, often made from felt material, to eliminate the friction against shoes and help alleviate inflammation and skin problems.
- Removal of corns and calluses on the foot.
- Changing to carefully fitted footwear designed to accommodate the bunion and not contribute toward its growth.
- Orthotic devices—both over-the-counter and custom made—to help stabilize the joint and place the foot in the correct position for walking and standing.
- Exercises to maintain joint mobility and prevent stiffness or arthritis.
- Splints for nighttime wear to help the toes and joint align properly. This is often recommended for adolescents with bunions, because their bone development may still be adaptable.
Depending on the size of the enlargement, misalignment of the toe, and pain experienced, conservative treatments may not be adequate to prevent progressive damage from bunions. In these cases, bunion surgery, known as a bunionectomy, may be advised to remove the bunion and realign the toe.
Brachymetatarsia is a condition in which one of the bones in the front of the foot is significantly shorter than the others. Although it may affect any of the five metatarsals, it most commonly affects the fourth metatarsal.
A Bunion (also referred to as hallux valgus or hallux abducto valgus) is often described as a bump on the side of the big toe.
Bursitis is an inflammation of a small fluid-filled sac, called a bursa, located near a joint, bone or tendon.
Ligaments surrounding the joint at the base of the second toe form a “capsule,” which helps the joint to function properly. Capsulitis is a condition in which these ligaments have become inflamed.Read More
Haglund’s Deformity is a bony enlargement on the back of the heel. The soft tissue near the Achilles tendon becomes irritated when the bony enlargement rubs against shoes. This often leads to painful bursitis, which is an inflammation of the bursa (a fluid-filled sac between the tendon and bone).
Hallux Rigidus is a disorder of the joint located at the base of the big toe. It causes pain and stiffness in the joint, and with time it gets increasingly harder to bend the toe. ‘Hallux” refers to the big toe, while “rigidus” indicates that the toe is rigid and cannot move. Hallux rigidus is actually a form of degenerative arthritis.
A neuroma is a thickening of nerve tissue that may develop in various parts of the body. The most common neuroma in the foot is a Morton’s neuroma, which occurs between the third and fourth toes. It is sometimes referred to as an intermetatarsal neuroma.
Tailor’s bunion, also called a bunionette, is a prominence of the fifth metatarsal bone at the base of the little toe. The metatarsals are the five long bones of the foot.
Webbed Toes (also known as syndactyly) is a rare condition seen in approximately one in 2,000 births. Those with this condition have two or more toes that are partially or fully joined by a flexible skin bridge.