The plantar fascia is a thick band of connective tissue that runs along the bottom of the foot, connecting the heel bone to the toes. It plays a crucial role in supporting the arch of the foot and helps absorb shock during walking and running. When the plantar fascia becomes inflamed or irritated, it can lead to a common condition known as plantar fasciitis. This condition often causes pain in the heel and bottom of the foot, especially with the first steps in the morning or after prolonged periods of sitting. Proper footwear and stretching exercises can help alleviate the discomfort.