High arched feet, Pes Cavus or Supinated and Varus feet are all terms that describe feet with an increased arch height and a outward heel tilt (away from the midline).

High arched feet are much less common than Flat Feet and are generally described by their function as either rigid or flexible.

People with rigid high arched feet tend to bear weight mainly on the balls of their feet particularly under the big toe joint and their heels which can cause pain, discomfort and overload of the tissues. High arched feet have poor shock absorbency due to the rigid structure.

They may also have problems with ankle instability and be at a greater risk of developing Peroneal Tendonopathy and recurrent Ankle Sprains.. A restriction in ankle movement called Equinus is also a common finding.

Flexible high arched feet may change shape in weight bearing activities  -  the arch lowers; this type tends to be more at risk of conditions usually associated with flat feet such as Plantarfaciitis. 

In some cases high arched feet are associated with an inherited neurological disorder called Charcot Marie Tooth Disease (CMT) which occurs in roughly 1 in every 2500 people.