Plantar fasciitis is the most common cause of heel pain. The plantar fascia http://www.webmd.com/hw-popup/plantar-fascia is the flat band of tissue (ligament http://www.webmd.com/hw-popup/ligament ) that connects your heel bone to your toes. It supports the arch of your foot http://www.webmd.com/pain-management/picture-of-the-feet . If you strain your plantar fascia, it gets weak, swollen, irritated and inflamed http://www.webmd.com/hw-popup/inflammation ).
Then your heel or the bottom of your foot hurts when you stand or walk. Plantar fasciitis is common in middle-aged people. It also occurs in younger people who are on their feet a lot, like athletes or soldiers. It can happen in one foot or both feet. What causes plantar fasciitis? Plantar fasciitis is caused by straining the ligament that supports your arch. Repeated strain can cause tiny tears in the ligament. These can lead to pain and swelling.