What Does Mildly Painful, Bubbly Thing On Vagina Indicate?

I have a bubble type thing on my vagina, right between the middle and the outer lip. It s not really painful, only if I put pressure on it. I don t know if I should try and pop it or just leave it but it s weird looking and I don t know what it is. It s not red or irritated or anything, it s just there. Please help.