What causes plantar fasciitis?

The plantar fascia runs beneath the foot and helps support the arch. Repeated walking, running, jumping, or long periods on hard surfaces can load its attachment near the heel. A sudden increase in exercise, reduced calf flexibility, extra body load, or shoes with poor support can add strain. Flat feet may change how the fascia is loaded; learn more about [Flat Feet](/conditions/flat-feet/).

Pain is often strongest with the first steps after sleep or rest, then may ease as the foot warms up and return after prolonged activity. The term plantar fasciitis is commonly used for this pattern, although symptoms can reflect irritation and altered tissue tolerance rather than a single acute event. More condition information is available under [Plantar Fasciitis](/conditions/plantar-fasciitis/).

Temporarily shorten painful walks and avoid sudden increases in running or jumping. Supportive, comfortable shoes may help, and gentle calf and foot exercises can restore flexibility and strength over time. Rolling the sole over a chilled bottle may soothe symptoms. A physiotherapist can tailor loading, footwear advice, and a gradual return plan; avoid forcing a painful stretch.

Seek an assessment if heel pain does not settle with activity changes, interferes with normal walking, or keeps returning. Prompt review is sensible after a fall or sudden tear-like pain, or when there is significant swelling, redness, numbness, fever, or inability to bear weight.

Ask whether your symptoms fit plantar fasciitis, whether calf tightness or foot mechanics are contributing, which exercises to start, and when to progress walking or sport.