Notice a firm, rubbery lump directly under the nipple or areola
Check for swelling in one or both breasts
Feel for tenderness or sensitivity in the chest area
Look for a breast shape that is more rounded or puffy than usual
Compare both sides for uneven enlargement
Notice nipple enlargement or puffiness around the areola
See whether the tissue feels gland-like rather than soft fat
Check if the enlargement has been present for weeks or months
Observe whether the change is not explained by weight gain alone
Seek medical evaluation if there is pain, nipple discharge, rapid growth, or a hard lump
Seek medical evaluation if only one side is enlarged or the area feels fixed in place