When a breast implant loses its hold or the underlying muscle is too weak to hold it in place, it is called a “bottom-out.” As a result, the implant may begin to sink into the breast. A lack of breast tissue flexibility caused by significant weight loss, pregnancy, and breastfeeding, or natural aging is the most common reason for a “bottom-out.” Patients who choose the wrong implant size for their body type may also experience breast implants bottoming out.