Old breast implants now hard: why?
When an augmented breast becomes hard, the likely culprit is capsular contracture--hardening of the scar capsule around the implant. Your capsular contracture may have been triggered by a rupture in your old implants, a recent infection (sinus infection? dental infection?), or for no identifiable reason at all.
The treatment is the same, regardless of the reason: implant removal, complete removal of the scar capsule, and placement of new implants (if you still want implants)....