Extracorporeal Shock Wave Therapy - Podiatrist Toronto, ONbr Sheldon Nadal Doctor of Podiatric Medicine discusses Extracorporeal Shock Wave Therapy (ESWT) for foot and ankle problems.br Extracorporeal Shock Wave Therapy (ESWT) is used to treat chronic heel pain (plantar fasciitis). Extracorporeal means outside of the body. During this noninvasive procedure, sonic waves are directed at the area of pain using a device similar to that currently used in nonsurgical treatment of kidney stones.