question: pain is like heartburn but in a small area in left breast, not all time, sometimes happens when I drink liquid, and sometimes when I dont (I tend to drink hot boiled water frequently throughout the day) There is no lump in the breast, just this occasional heartburn like sensation inside the breast in a small spot. The sensation is approximately halfway between the cleavage and the nipple (but one inch higher than the level of the nipple). The sensation area is about a one inch circle in size