There are very few absolutely perfectly symmetric human beings. We all have some minor (or major) discrepancies between our right and left sides. During your gynecomastia surgery, your doctor does everything possible to make each side of your chest as good as that side can be. In reducing the excess tissue on the chest, minor asymmetries of the chest, which may have been masked by the excess overlying tissues, are then revealed. For example, one muscle may be larger than the other. The muscle itself may be attached to the ribs and sternum in slightly different ways on both sides. The rib cage may be different on each side. Posture and scoliosis (curvature of the spine) will also play a role.
Some men start off with asymmetric gynecomastia – one breast being larger than the other. Although surgery will reduce each side to be as good as possible, the (originally) larger side, with more stretched out skin and perhaps a larger diameter areola, will take longer to tighten and catch up to the smaller side – and it may never catch up 100%.
For the most part, there will be an overall significant improvement of the chest. Some men may have been mildly asymmetric to begin with – but they never noticed it. After surgery, and after carefully inspecting their chest 100 times a day, men may notice and dwell on certain minor asymmetries. Unfortunately, some of these post-op minor asymmetries cannot be corrected.
