Plantar fascitis can affect persons of all ages, but it usually affects people in the 40 to 70 years age group. It is largely caused by age related changes which occur in this group.

After losing its elasticity and the thick fat padding of sole, the plantar fascia becomes prone to injuries after repetitive work like walking strenuously or doing exercises, causing swelling and pain in the heel.

Some conditions of the foot like Flat Feet and High Arched Feet also make a person prone to suffer from plantar fascitis. Diabetes and obesity are also thought to related factors. Among younger people, plantar fasciitis is seen commonly in athletes who exercise a lot, resulting in repetitive micro trauma in the feet.