Can chest workouts rebuild my chest after unilateral gynecomastia surgery about 5-6 years ago? Or is surgery required? (photo)

Asymmetry during the healing process is not at all uncommon after any breast surgery. Also, as you heal, the area may feel “lumpy” and irregular. This, too, decreases with time, and massaging these areas will help soften the scar tissue. The #compression garment helps reduce the swelling, and the longer it is worn, the more quickly you will #heal. It can also assist in the retraction of the skin.Please be advised that each patient is unique and previous results are not a guarantee for individual outcomes. As with all cosmetic surgery, results will be rewarding if expectations are realistic. With any surgical procedure, there are some risks which your doctor will discuss with you during your consultation.

Thank you for your question and for sharing your photographs.  I do see the subtle asymmetry between your left and right chests, but would not recommend any surgical procedures at this time.  You should be able to improve upon the differences through continued diet and exercise.  If this does not sufficiently correct your chest, you may consider liposuction of the non-operated chest but be aware that there is almost always some degree of difference between the sides of the body. 

Based on photos, another surgery is unwarranted.  Take note that revisions are reserved for patients with noticeable or extreme cases of asymmetry, nipple collapse, significant scarring. Nevertheless, you may want to visit your PS or find a second opinion to share your concerns. I hope that helps and good luck.