Hello. I have these 4 little lumps on the back of my tongue and I dont know what it is. I've had them for years now, and never thought to get it checked because i felt they were normal, since they never hurt, never grow or change color or size, they are the same color as my tongue, never bother, i actually forget i have them most of the time. They kind of look like little bubbles. I wasnt sexually active whithin the first 2 years of attaining them so it can't be that. It can't be an allergy or burn since i never eat the same thing everyday and the bumps never change...i just have no idea what they are or if i should be concerned. help please.