First Ray Hypermobility
There are five long bones in our feet called metatarsals, and when working properly, weight-bearing forces are shared between all of them. The largest of these five metatarsals, the first metatarsal, is the one connected to the big toe. It is the largest of the five metatarsals, and handles a significant portion of the weight-bearing forces. Sometimes the first metatarsal will get overworked, which causes the joint connecting it to the midfoot will get loose and become hypermobile. A common associated problem with first-ray hypermobility is lesser-ray transfer metatarsalgia.