Plantar fasciitis is a common cause of heel pain. It is caused by inflammation of the plantar fascia, a thick band of tissue that runs along the bottom of the foot from the heel to the toes. The plantar fascia supports the arch of the foot and helps to absorb shock when walking and running.

Symptoms

The most common symptom of plantar fasciitis is heel pain, which is often worse in the morning or after prolonged periods of standing or sitting. The pain may also be worse when you first get up from bed or when you climb stairs.

Other symptoms of plantar fasciitis may include:

Stiffness in the heel or foot, especially in the morning
A stabbing or burning pain in the heel
Swelling in the heel
Tenderness to the touch in the heel or foot
Causes

Plantar fasciitis is caused by overuse or stress on the plantar fascia. This can happen due to a number of factors, including:

Overweight or obesity: Excess weight puts extra stress on the plantar fascia. Activities that put stress on the feet: This includes running, jumping, and dancing. Wearing shoes with poor support: Shoes with a high heel or poor arch support can put extra stress on the plantar fascia.
Having flat feet or high arches: People with flat feet or high arches are more likely to develop plantar fasciitis. Sudden changes in activity: Suddenly increasing the amount of time you spend on your feet can put extra stress on the plantar fascia.