If you lose weight after breast reduction & breast get smaller. If you gain weight will, your breast get bigger?

Gravity continues to have its effect, and there is a tendency for the skin of the breasts to stretch over a long period of time. This can be slowed by regular bra use when upright although 24 hour support is suggested. Although, women vary a great deal in this respect, in general, the smaller the #breasts the less the tendency for #sagging to recur. If the breasts do sag, further excision of the skin on an outpatient basis can be used to correct the problem. If we try to #lift heavy breasts without making them smaller at the same time, sagging will return soon. One key to a satisfying result is realistic expectations.

You should probably meet with your surgeon to address your concerns. Good luck!Always insist on a board certified surgeon for all cosmetic procedures!

Yes.  If you gain weight then your breasts will get larger.  How much larger will depend on how much weight you gain.  Hope this helps, take care.