Do you feel pain in the bottom of your feet after your first steps in the morning, or within a few minutes of standing? Do you feel like there's a small strain in your foot? You could have plantar fasciitis, one of the most common foot conditions, which affects one in 10 people. Podiatrist Dr. Bob Baravarian explains that plantar fasciitis is caused when the thick ligament along the sole of the foot that is responsible for supporting the arch becomes inflammed.