Osteoarthritis is a condition in which the cartilage that protects and cushions the joints breaks down over time. Eventually, the bones-formerly separated by the cartilage-rub against each other. This results in damage to the tissue and bone and causes painful joint symptoms.

Osteoarthritis is common in the joints of the toes. It is most often found in the joint where the big toe joins the foot. It is also common in the smaller joints of the other toes.