Under arm lipo Monders cord? (photos)

The doctor said it is monders cord. He said its a vein which is coagulated and no longer carrying blood. He said to push very hard on the scar, causing it to crack into small segments. put your arm up against the wall and stretch it out. if you push on it and it cracks, that is what is supposed to happen. question, how hard do I push and how long until it pops? If I don't do anything will itgo away on its own? And should I push in the arm pit area as well?