<s>[INST] 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? [/INST] Hi,Dear,Welcome to HCM. Based on the facts of your query,You seem to suffer from-Tendoachilles Subtendinous Bursitis./Retro-Calcaneal Bursitis / or could be from -Sever's Disease of-Calcaneal Apophysitis.USG and X-ray of the ankle would fix the diagnosis.Treatment -Would be Motrin/ Steroids Intralesional/ 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!! Dr.Savaskar, Senior Surgical Specialist M.S.Genl-CVTS </s>