Hi, may I answer your health queries right now ?  Please type your query here...my son had an absessed tooth and could not get into a dentist so we took him to our dr and he has been on antibiotics for 8 days now.  I had to retake him in because above his lip was causing him pain.  When he flipped his lip up the puss just poured out of it.  He got a shot of antiobiotic and the DR found a dentist for him tomorrow.  Can you tell us what this is called and what they are looking for.
Hellooo...read through your query...accordingly I feel that it can be an abscess of front teeth(since u told only upper lip).it can be either due to deep decay of tooth or due to trauma(which u have forgotten to explain).it can be treated based on the X-ray and clinical presentation which will be done by your dentist.treatment will be first reduce the abscess and then do rootcanaltreatment and crown...so nothing much to worry in this case...meet your dentist get it done...tell your dentist that u have already been on medicine for so long(BCO without knowing that he may again prescribe antibiotics, and it causes more infection resistance of the bacteria)be cool...hope your benefitted something from this reply.have a healthy day!!!