Plantar fasciitis (say "PLAN-ter fash-ee-EYE-tus") is the most common cause of heel pain. The plantar fascia is the flat band of tissue (ligament) that connects your heel bone to your toes. It supports the arch of your foot. If you strain your plantar fascia, it gets weak, swollen, and irritated (inflamed). 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.
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. This is more likely to happen if:
Most people with plantar fasciitis have pain when they take their first steps after they get out of bed or sit for a long time. You may have less stiffness and pain after you take a few steps, but your foot may hurt more as the day goes on. It may hurt the most when you climb stairs or after you stand for a long period.
If you have foot pain at night, you may have a different problem, such as tarsal tunnel syndrome.
No single treatment works best for everyone with plantar fasciitis. But there are many things you can try to help your foot get better: