High arches or cavus feet can be troubling as the feet cannot absorb the shock of weight-bearing as well as the average foot does.  There are different types of cavus feet (high arches).  Some are rigid and some are flexible.  Most will still pronate when needed but it can lead to jamming of the joints.

Lack of appropriate pronation may cause problems with walking on hard surfaces. This can cause the balls of the feet and/or the heels to hurt.  They are also susceptible to plantar fasciitis and strain in the arches. Other problems commonly associated with cavus feet are low back, sacroiliitis, ankle instability, neuromas and peroneal tendonitis. Many times spurs can develop on top of the midfoot area as well.

Sometimes cushioning is all that is needed but it does not really address the imbalance in the foot.  Also, most over the counter inserts will not go high enough in the arches. This is necessary to relieve abnormal pressures causing pain and arthritis.  Some will apply a wedge laterally (on the outside of the foot) to shift the weight to the inside of the foot but this can place a strain on the ankle joint long term.  The best treatment is to balance the foot out with custom molded orthotics.  They not only aid in better osseous alignment but also redistribute pressure more evenly for comfort.