Breast hyperplasia and breast lumps are different. Breast hyperplasia can be found in one or both breasts, where nodular lumps of varying sizes can be felt. These lumps are tough but not hard, sometimes causing a stabbing pain. The borders of the lumps are not distinctly separate from the surrounding breast tissue, but they are not adhered to the skin or the chest muscles. Sometimes, they manifest as areas of thickening with unclear boundaries. On the other hand, breast lumps generally occur as a single lump in one breast, are round or oval in shape, have clear boundaries, are movable, and the texture is generally firm. They might be multiple, but usually, there's no breast pain or only mild discomfort during menstruation. The size and nature of the breast lumps do not change with the menstrual cycle.