Yes,Sarah, I find that also. While I have the heartburn I cannot notice the lump but when it calms down, then I feel the lump there. I would rather have the lump than heartburn as that is not painful, just irritating. I am trying the spring water recommended by Northern Joe and I think it may be helping. I don't have so much heartburn anyway. I do most of the things that are supposed to help acid reflux, elevated bed, no tea, coffee, or soft drinks, etc, so something is bound to work one day. I see you are taking Nexium. That didn't help me, nor did Pariet. Before that I took Zantac and then Domperidome. Not much help from any of those things. I think the liquid Gaviscon helped a bit. I took enough to kill a horse but anyway, I'm not on that at the moment nor anything else. So, I think considering that I had taken so much before and had no relief that the tap water must have been a problem for me. Good luck, Carol