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1 Common causes of heel pain include obesity, ill-fitting shoes, running and jumping on hard surfaces, abnormal walking style, injuries and certain diseases.  Plantar fasciitis is inflammation of the ligament that runs the length of the foot, commonly caused by overstretching.
Plantar fasciitis. Plantar fasciitis causes pain in the heel and bottom of the foot. It is due to inflammation of the plantar fascia. The plantar fascia is a muscle-like connective tissue at the bottom of the foot. Plantar fasciitis is associated with overuse, such as with runners, or in cases of obesity.