It is narrated from Sayyiduna Abu Ramtha (may Allah be pleased with him) that once, in my childhood, I presented myself along with my father in the service of the Prophet Muhammad (peace and blessings be upon him). My father said, "O Messenger of Allah! I am considered a great physician among the people. May I see that raised piece of flesh on your back?" The Prophet Muhammad (peace and blessings be upon him) said, "What will you do?" He replied, "I will cut it off." The Prophet Muhammad (peace and blessings be upon him) said, "You are not a physician, you are a companion. Its healer is the One who created it."