Within a few days: Your breasts will respond to the estrogen-like component of your birth control pills within 24 hours to a few days. You may experience tenderness, swelling, or even some clear nipple discharge -- all of this is normal.
Answered 9/28/2016
6.1k views
Maybe never: Sometimes they don't swell as the dose of hormones may be too low to affect them- or they could in a couple of days.
Answered 4/3/2015
5.5k views
May not happen: Not everyone gets breast swelling with birth control use. This can be a side effect of birth control pills but not all side effects are experienced by individuals who take the medication.
Answered 7/29/2018
5.5k views
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