<s>[INST] I have pain in my lower back just above my butt, like maybe its not even my back really. On either side of spine feels like small air bubbles where the pain/ tension is. What are these bubbles/things? They dont hurt really, but its like I can roll them them around a bit but cant break or really move them.. like air pockets or something. What is this? [/INST] Hello, The bubbles that you are feeling may be collection of fat (called lipomas), or nerve thickening (neurofibromas). Both of them do not need any specific treatment. A regular monitoring by doctor is advised. Also, to confirm diagnosis it needs to be seen by a doctor. Usually both of these are not confined to the area that you have described, and they are likely to be more widespread over the body. A careful examination may reveal some more of these in other places. Good luck. </s>