Breast implant capsular contracture is a condition where the scar tissue (capsule) around a breast implant tightens, causing the breast to harden, change shape, or feel painful. Normally, the body forms a soft, protective capsule around the implant, but in capsular contracture, this capsule becomes excessively thick and constricted. Risk factors include bacterial contamination, smoking, and certain implant placements. Treatment options vary, from massage and medication to surgical removal or replacement of the implant to alleviate discomfort and restore appearance.