A thin but strong fascial tissue at the bottom of your feet called the Plantar Fascia can get injured and damage from too much overuse and pressure.  Common causes of pain to the heel and arch area are tight calf muscles, obesity, high arches, new and repetitive activity like running.  Aging also causes the fascia to be less elastic.  This is a very common condition but has a high success rate of treatment with Shockwave Therapy and wearing proper orthotics.