A few days after male mammary gland development ...

Not too tight, just one layer and two layers. You already sewed it. The purpose of wrapping it is to prevent the invasion of dust and some bacteria. Itching is a good thing, which proves that your wound heals quickly. Don't scratch it with your hands. If your hands are dirty, it is easy to get infected. Rubbing the cold side with some alcohol will itch, but it won't rub the wound, and it will make your wound heal slowly. Just wipe it and disinfect it. I wish you a speedy recovery! !