Septum: The septum is the name given to the cartilaginous tissue that separates the nostrils. In spite of what one may think, it is not the cartilage that is pierced, but just the soft skin at the base. Medusa/Philtrum: A piercing centred above the upper lip is generally known as a “Medusa”. The correct anatomical term, as used by professionals in the Anglo-saxon countries, is Philtrum. The general idea that people have about this piercing is that it causes loosening of the teeth and/or retraction of the gums. True and false. A badly-placed piercing, or one with a jewel that is too long will, in the end, cause these results. Come to see the piercer, and he will shorten the jewel for you. If the piercing is well carried out, and with a well-adapted jewel, these after-effects are not to be feared.