Breast augmentation enhances the size and shape of the breasts using either saline or silicone implants. The procedure is usually performed under general anesthesia on an outpatient basis and takes 2 to 3 hours. Side effects may include temporary soreness, swelling, change in nipple sensation, and bruising. Risks may include infection, asymmetry, or an increase or decrease in sensitivity of nipples or breast skin, which is occasionally permanent. Patients may return to work in 1-2 weeks. Tightening and hardening of scar tissue around the implant ("capsular contracture"), or rupture of the implant may occur; either may require surgery to release the scar tissue or to remove or replace the implant. Breast implants are not lifetime devices and may require removal or replacement. Learn more about breast augmentation.