<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi there, I am wanting some advice. For the past couple of months I have had a lump on the heel of my foot, Its quite painful and I want walk or touch that part of my foot, its like i have a marble on the inside of my foot, any ideas on what thing could be?  <response>: Hi, Dear,Welcome to Chat Doctor. Based on the facts of your query, You seem to suffer from-Tendoachilles Subtending Bursitis.Retro-Calcaneal Bursitis or could be from -Severs Disease of-Calcaneal Apophasis.USG and X-ray of the ankle would fix the diagnosis. Treatment -Would be Motrin Steroids Intraluminal Hot fomentation Rest infrared heat locally would help.Hope this reply would help you to plan further treatment with your doctors. Contact with a Followup Premium question to ME. Will appreciate your Hitting thanks and writing excellent review comments to help needy patients like you. Good Day!! Chat Doctor. S. Genl-CVTS 