As with any surgery, bleeding, infection, bleeding greater than usual or complications related to anaesthesia are a possibility.
As for specific risks, the occurrence most concerned with this form of surgery is capsular contracture (tightening of the scar that is created around the prosthesis). When an implant is made, the organism wraps the prosthesis in a layer of tissue. This layer, called a capsule, in most cases has thin walls and leaves enough space for the prosthesis to be distended, thus preserving the proper soft touch.
In a small percentage of women, the capsule becomes thick, retracts and compresses the prosthesis, causing it to harden. Capsular contracture can occur in one or both breasts. Contracture can occur at any time.
It is not yet known why some women produce it and others do not. If there are no signs of hardening after six months following surgery, it may not occur. The incidence of this complication is around 3%, according to statistics. In further surgeries, the capsular contracture might be higher.
