During a physical examination for breast hyperplasia nodules, nodular lumps of varying sizes can be felt in one or both breasts. These lumps are tough but not hard, and sometimes tender to touch. The boundary between the lump and surrounding breast tissue is unclear, yet there is no adhesion to the skin or chest muscle. Sometimes it appears as an ill-defined thickening area, most often located in the upper outer quadrant of the breast, but it can also affect the whole breast. The lumps often swell before and during menstruation and shrink after. In ultrasound imaging, breast hyperplasia nodules appear as uneven low-echo areas, and if cysts form, they appear as anechoic areas.