Heel pain is usually caused by a condition known as plantar fasciitis. The ligament called the plantar fascia on the bottom of the foot become inflamed where it attaches to the heel. To prevent this inflammation, you should avoid walking barefoot. Also, taking an anti-inflammatory such as Advil or Motrin along with wearing a pair of shoes with good arch support should help manage the pain; you may also ice the heel. If the problem persists, see your podiatrist as soon as possible to prevent further damage.