Notice whether one or both breasts have enlarged
Check for a firm, rubbery lump directly under the nipple or areola
See whether the enlargement is symmetrical or uneven
Feel for tenderness, soreness, or nipple sensitivity
Compare the chest size over time to see if it is persistent or increasing
Check whether the nipple or areola looks puffy or raised
Look for breast tissue that feels different from chest fat
Notice whether the condition affects both sides or only one side
Consider whether it started during puberty, after a medication change, or with weight gain
Seek medical evaluation if there is nipple discharge, a hard fixed lump, skin changes, or rapid growth
Seek medical evaluation if there is pain, swelling on one side only, or a lump that feels unusual
Seek medical evaluation if you are unsure whether it is breast tissue or fat
Seek medical evaluation if the enlargement lasts more than a few months or is getting worse