In reply to goldmember: Have you increased your mileage lots recently? I went from not much running to 50+ miles a week and developed a lump and pain where the achilles joins the heal.
The physio described how the achilles was pulling away from the heal because of the increased use and the gap was filling with new, tender bone, which was sore for a few days after a run. Ice after each run eased it up, it has since settled down to a couple of pain free boney lumps.
Where is the front of the heal? Bottom of your foot or top of your foot?