<s>[INST] I am 37 weeks pregnant and I noticed a a lump on my vagina. When I looked at it I realised that it was just a spot. However, I noticed that just inside my vagina is an extra part that wasn t there before I fell pregnant. I have suffered from painful intercourse whilst pregnant, could this be the cause? [/INST] Hi, I understand your concern.  You seem to have an abscess of a mucus secreting gland present in side part of outer vaginal fold. Its Bartholdi cyst.  It occurs due to occlusion of the duct of gland.  Unless infected it remains without any symptoms. But once infection sets in inflammation, pain, fever followed by Catholics abscess follows.  So, If there is no other problem except for swelling... you have to follow vaginal hygiene/ avoid any trauma or infection.  But if there is infection & inflammation, you should consult your doctor for necessary treatment & management.(which will include antibiotic, anti trichomonal, anti-inflammatory medications/ incision & Chat Doctor. . As per need.)  Thanks. </s>