This area of hyper pigmentation may not be related to your previous breast augmentation. Try a good moisturizer if that does not help you may need to see a dermatologist.
Those drugs impose a health risk with respect of going under general anesthesia.The AnesthesiologistI work with recommends a 2 week period off of any of these stimulant type of drugs both before and after surgery.
And you do not have to worry about someone else seeing them... unless there is a data breach and that results in litigation and penalties. Buried in your consent is probably a clause about taking photos as it is standard practice in aesthetic surgery.