Plantar fasciitis 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: your feet roll inward too much when you walk (excessive pronation); you have high arches or flat feet; you walk, stand, or run for long periods of time, especially on hard surfaces; you are overweight; you wear shoes that don’t fit well or are worn out; you have tight Achilles tendons or calf muscles.
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 time.
If you have foot pain at night, you may have a different problem, such as arthritis, or a nerve problem such as tarsal tunnel syndrome.
Plantar fasciitis most often occurs because of injuries that have happened over time. With treatment, you will have less pain within a few weeks. But it may take time for the pain to go away completely. It may take a few months to a year. Stay with your treatment. If you don’t, you may have constant pain when you stand or walk. The sooner you start treatment, the sooner your feet will stop hurting.