Sore lump in vagina

i only noticed in the last few days, it has been really painful during sex, not itchy or anything and barely even noticed until i had sex and it was hurting

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it will slowly pop. the photo is a little bit grainy but i think it is just generic run of the mill lump and just make sure it does not attract infection when it pops but keeping the area clean. do you have them in other area? i would make sure it is just this one and monitor its size.