Ankle and Foot Pain What is Plantar Fasciitis? Running can in some cases bring a great deal of pressure and strain that can cause aggravation of the tissues. This is called Plantar Fasciitis. It is a thick band of connective tissues that associates the impact point unresolved issue toes and goes about as a stun ingested in your foot. A lot of weight on it can harm the belt which prompts heel agony and solidness. No less than 1 of every 10 individuals experience the manifestations of Plantar Fasciitis in their life.