Causes. Equinus is often it is due to tightness in the Achilles tendon or calf muscles. For some, this may be congenital (present at birth) or an inherited trait. For others, this tightness is acquired and the result of being in a cast or on crutches, or frequently wearing high-heeled shoes.

What is an equinus deformity?

Equinus is a condition in which the upward bending motion of the ankle joint is limited. Someone with equinus lacks the flexibility to bring the top of the foot toward the front of the leg. Equinus can occur in one or both feet.

Can Equinus be fixed?

In some cases, surgery may be needed to correct the cause of equinus if it is related to a tight tendon or a bone blocking the ankle motion. The foot and ankle surgeon will determine the type of procedure that is best suited to the individual patient.