What to do for excessive swelling on the labaret monroe piercing?

If the piercing has swelled to a point where you think it's excessive you need to go back to the studio that did it and have them put a longer stud into the piercing so it can drain and so the swelling can be relieved. A professional body piercer will account for some swelling and the jewellery needs to be long enough for this to occur without causing any further trauma. So go back and get them to fix it, if they are smart they will do it at no charge to you because they didn't account for the swelling nor did they instruct you on how to control the swelling.