My friend got a bump on her lip from smoking with me but I dont have any STD I got checked out last week. so what could it be?

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+1 y
she said her doctor told her thwt it was bacteria or something too me it just look like she has a medium size pimple on her lip
My friend got a bump on her lip from smoking with me but I dont have any STD I got checked out last week. so what could it be?
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