Capsular contracture is excessive hardening and tightening of the connective-tissue capsule around an implant. In the breast, it can cause a change in shape, increased firmness or pain. A thin, soft capsule, by contrast, is part of the normal response to an implant.
The Baker classification describes different degrees: grade I is a soft breast without a noticeable change; grade II involves some firmness; grade III involves clear firmness with a visible change in shape; and grade IV also includes marked discomfort or pain.
Treatment depends on symptoms, examination findings and personal goals. More pronounced cases may require surgery. Replacing the implant or operating on the capsule does not reliably prevent recurrence.