Breast lift & implant exchange. What's the best way to treat mild nipple venous congestion? (Photo)

Really not certain your suffering from venous congestion although it does look like the areola is not pleased with the operation. You seem to have gotten an excellent result in my guess is that the areola will look perfectly normal when healing is complete.

Kudos to you on choosing the right plastic surgeon.  It appears your surgeon did an excellent lift/augmentation, and then when he or she realized there was some compromise to the nipple areolar complexes, he or she recommended hyperbaric oxygen (brilliant!).  At this point, it appears that whatever compromise you had originally, it has now become quite minor and superficial.  If you were my patient, at this point, I would recommend one more hyperbaric treatment just for cheap insurance, and then the use of Silver Sulfadiazine on the discolored areas of your areola to keep down the bacterial count and moisturize your areola to allow natural wound healing.  From what I can see, all these darkened areas on the areola will heal below the epithelium.  There will be a minor slough and some minor discoloration which should correct itself with time.