Welcome to healthcaremagic.
It seems like calcaneal spur
.X-ray will confirm that.
There may be other causes also.Consult your Doctor for that.
Checkout for the soles of your shoes as they could be culprit..
For pain-try contrasting between ice and heat. Start with an ice pack on the heel for 5 minutes. Switch to a heating pack or a hot water bath for 5 minutes. Alternate between the two for 20- 30 minutes 3-4 times a week.
Hope it will help.