An apparatus and method for treating plantar fasciitis are disclosed. In one embodiment of the apparatus, a dorsal splint device includes an upper portion and a foot portion which are pivotally connected to one another. A strap allows attachment of the upper portion to a suitable portion of the leg, such as the calf. A tensioning element, such as a shock cord, urges the foot portion and the upper portion toward one another. The tension provided by the tensioning element may be adjusted by adjusting the length of the tensioning element. In the method of the present invention, the tensioning element may be first unhooked to allow pivoting of the foot portion with respect to the upper portion so that the device may be attached to a user. The tensioning element is then hooked to the device at the appropriate position to provide the desired tension urging the foot portion toward the upper portion.