Few days ago i noticed a small bump on my labia, few days later it was bigger, what is it? I know it's no STD.

I dnt think is the B cyst ,
Answer:
It is possible that this could be a hair follicle. Try sitting in the bath tub with the water as hot as you can take it. This will make the bump come to a head and eventually burst on it's own. It may take a few days for this to happen but be patient. If you have more serious concerns, seek a doctor for treatment. Good Luck.

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It could be a boil (it's like a blood filled zit) Heres a link with treatment info for you:

http://www.webmd.com/skin-problems-and-t...

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It could be a tiny shard of glass or a piece of shrapenel that's been imbedded under the skin finally working its way out. that's why you should careful what you insert in your vagina.

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