Capsular contracture is the most common complication after breast implant surgery. It happens when the scar tissue that naturally forms around any implant tightens and hardens, squeezing the implant and potentially changing the shape, feel, and position of the breast. It affects roughly 15 to 19 percent of augmentation patients over a 10-year period, though rates vary widely depending on implant type, placement, and surgical technique.
Why Your Body Forms a Capsule
Every time a foreign object is placed inside the body, the immune system responds. Within minutes of implant placement, immune cells from surrounding tissue migrate to the implant surface and begin a cascade of inflammation, wound healing, and scar formation. The end result is a thin envelope of scar tissue, called a capsule, that surrounds the implant completely. This capsule has three layers: an inner layer of immune and connective tissue cells, a middle layer of loose tissue with blood vessels, and a dense outer layer.
In most cases, this capsule stays thin and flexible, and the breast looks and feels natural. Capsular contracture occurs when something keeps the inflammatory process going longer than it should, causing the capsule to thicken and contract around the implant.
What Triggers Excessive Tightening
The leading theory points to bacterial biofilm as the primary driver. Biofilm is a thin, invisible layer of bacteria that can adhere to the implant surface during or after surgery. These bacteria are resistant to standard antibiotics and don’t cause a visible infection, but they provoke a persistent low-grade immune response. As the body keeps trying to fight off the bacteria, immune cells release inflammatory signals that stimulate ongoing scar tissue production. This cycle of inflammation and fibrosis is what transforms a normal, soft capsule into a thick, constricting one.
Other factors that prolong inflammation include blood collecting around the implant (hematoma), fluid buildup (seroma), and microscopic silicone particles that shed from the implant surface. Chronic micromotion of the implant within the pocket can also irritate surrounding tissue and sustain the inflammatory response. In one study, patients whose silicone implants had ruptured or were leaking silicone had a recurrence rate of nearly 70 percent after corrective surgery, highlighting how potent silicone exposure is as an inflammatory trigger.
How Capsular Contracture Feels and Looks
Surgeons grade capsular contracture on the Baker scale, which has four levels. Grade I is essentially a normal result: the capsule is present but the breast looks natural and feels soft. Grade II involves minor cosmetic changes, with the breast feeling slightly firmer than normal but still looking mostly natural.
Grade III is where the condition becomes obvious. The breast feels noticeably firm, looks visibly distorted, and the implant may start to shift upward on the chest. Grade IV adds significant pain to the firmness and distortion. At this stage, the tightening can restrict range of motion in the arm and shoulder and cause chronic discomfort that interferes with daily life.
The timeline varies. Some patients develop contracture within months of surgery, while others don’t notice symptoms for years. Early signs include a gradual increase in firmness or tightness in one breast, a feeling that the implant sits higher than before, or a visible change in breast shape compared to the other side.
What Affects Your Risk
Implant placement is one of the strongest modifiable risk factors. A meta-analysis found that placing implants above the chest muscle (subglandular) more than doubles the risk of contracture compared to placing them behind the muscle (submuscular). The muscle layer appears to provide a barrier that reduces bacterial contamination and implant exposure to breast tissue.
Implant surface texture also plays a role, though the data is more nuanced than many patients expect. Some sources cite a 15 percent contracture risk for smooth implants versus 5 percent for textured devices. But a widely cited meta-analysis found no significant difference between smooth and textured implants when placed behind the muscle. One study comparing both types in the same position above the muscle found contracture rates of just 1.6 percent and 3.3 percent, with no statistically significant difference. Newer “nanotextured” implants have reported contracture rates as low as 1 percent, though long-term data is still limited.
Other risk factors include surgical complications like hematoma or infection, radiation therapy to the chest (common after breast cancer treatment), and revision surgeries where scar tissue from a previous procedure is already present.
How It’s Treated
Grades I and II typically don’t require treatment. Some surgeons recommend massage techniques or medications that may help keep the capsule soft, though evidence for nonsurgical approaches is limited once contracture has progressed.
For Grades III and IV, surgery is the standard treatment. There are two main approaches. A capsulotomy involves cutting into the scar tissue to release the tightness without fully removing it. A capsulectomy removes the entire capsule, sometimes along with the implant. In many cases, the surgeon will replace the implant at the same time, often switching to a different type or moving it to a new pocket (for example, from above the muscle to below it) to reduce the chance of recurrence.
The choice between these procedures depends on the severity of the contracture, whether the implant has ruptured, and the surgeon’s judgment. Both are accepted approaches, and neither has been definitively proven superior to the other in all situations.
Recurrence After Surgery
Capsular contracture can come back after corrective surgery, and this is one of the most frustrating aspects of the condition. In one study of patients who underwent capsulotomy, about 23 percent experienced a recurrence. A smaller group, roughly 3 percent, developed contracture a second time after a repeat correction.
Recurrence risk climbs dramatically when silicone leakage is involved. Among patients found to have ruptured or bleeding silicone implants during surgery, 69 percent went on to develop contracture again. This underscores the importance of implant integrity. Interestingly, the same study found no significant difference in recurrence rates between patients whose original implants were reinserted (12.5 percent) versus those who received new implants (18.2 percent), suggesting that simply swapping the implant isn’t enough to prevent the problem from returning.
Reducing the Risk
Modern surgical techniques focus heavily on minimizing bacterial contamination during the procedure. Many surgeons now use a “no-touch” technique where the implant is handled as little as possible, irrigate the surgical pocket with antibiotic or antiseptic solutions, and use a funnel device to insert the implant without it touching the skin. Placing the implant behind the muscle, controlling bleeding carefully to prevent hematoma, and choosing an appropriately sized implant that doesn’t create excessive tension on the tissue all contribute to lower contracture rates.
For patients who have already experienced contracture, switching implant placement to a submuscular position during revision surgery, using a different implant surface, and meticulous pocket irrigation can help reduce the odds of it happening again.