My girlfriend is getting a sore in the same part of her month after we make out.  The last three times after making out she getting this sore that gos away after 2 to 3 days.  The sore is on her bottom lip ( in the middle of her lip).  We have kissed before and this havent happen (mouth to mount kissing)  Its only happening when we make out hot and heavy.  Its just wired that everytime we kiss hot and heavy she getting this same ( white sore in the same spot on her inside lip).  I dont have any sores anywhere on me...  Should we be worry about this?
Hi. Welcome to Chat Doctor . As per your query it seems that while being into a state of arousal during intercourse she has a tendency of biting the inside of her lip and due to trauma caused by teeth there is formation of an ulcer in the same spot every time. It does not seem like any infection and physical trauma is the most likely cause, but a confirmation can be done only after a clinical evaluation and investigations if required by an oral physician. As it is a recurring spot and is not persistent I does not seem like anything serious, and you need not worry about it. Hope this information helps. Thanks and regards. Chat Doctor. 