Extracorporeal Shock Wave TherapyExtracorporeal Shock Wave Therapy (ESWT) is an emerging treatment for chronic plantar fasciitis. Plantar fasciitis is an irritation to the tissue forming the arch of your foot. It causes sometimes severe pain in the arch and heel of your foot. In general, treatments for this condition can be simple, but sometimes, more aggressive forms of treatment are necessary to relieve symptoms. Surgery can be a last resort for people who have not responded to other treatments for plantar fasciitis, but this surgery doesn’t always have a high success rate and can have potentially complicating side effects.