It can take several months for the plantar fascia to heal. The plantar fascia is a tough, fibrous band of tissue that runs along the bottom of your foot from your heel to your toes. It supports the arch of your foot and helps you push off when you walk or run. When this tissue becomes inflamed, it's called plantar fasciitis. Plantar fasciitis is a common condition that causes pain in the heel and bottom of the foot. It can be caused by overuse, improper footwear, or an injury. Treatment typically involves rest, ice, and over-the-counter pain relievers. In severe cases, surgery may be necessary to release the tension on the plantar fascia.