Risk of and Corrections for Breast Asymmetry Asymmetry is a common risk for anyone undergoing breast augmentation. In this article we provide information on the common causes of breast asymmetry such as temporary swelling and post-surgical complications, including seroma and hematoma formation. If you notice asymmetry, the first thing you should do is consult with your surgeon to determine the cause. In most cases, asymmetry is only temporary, but in rare instances it may be the result of a post-surgical complication. Temporary Causes of Breast Implant Asymmetry Residual swelling can last for a month or longer following breast augmentation. Once swelling has subsided, the breast implants will begin to settle …