<s>[INST] 29 yr old male / non-smoker / very light drinker Have had a kind of bubble thing at the back of tongue, going on for almost 4 years. It is highly movable, flexible . . . like a small balloon. It protrudes when I stick my tongue out as far as I can . . . it s located right where that flap of skin meets the tongue. It is squishy and pink . . . it doesn t hurt to the touch either. There isn t pain and I can t really tell it s there . . . hasn t gotten any larger either. I first noticed it after getting a chili pepper flake stuck in that part of my mouth . . . it s been there ever since. I think it s a swollen tastebud or something but sometimes I m a hypochondriac. I cannot afford to see anyone right now and I m just looking for whatever reassurance someone can provide. The surrounding tastebuds are slightly swollen on that side too. I have a slight crossbite with my molars, as the result of two missing incisors on my top bite. Additionally, one back molar feels a little jagged . . . maybe that s it? [/INST] As per the description given by you the location, duration and appearance of the lesion-bubble like, no pain on touching shows very less possibility of infection as it is chronic and do not accompanied by the pain. It can be the lesion caused by the spillage of the Murine from minor salivary glands located at the floor of the mouth. If it is not making you any trouble let it be there until you visit a dentist or a physician. But you should definitely concern to the doctor to evaluate it by examine and if it is a lesion what I said, it should be excised. There is nothing to worry much as you get time and fill comfortable visit your doctor. Hope you are satisfied by explanation. Regards. </s>