That’s probably one of the reasons for the skin infections, not washing them adequately, I imagine.
When I was young I could go for days without washing a bra - hardly thought about it. (Sounds grim, but young women don’t sweat much there.) After having a baby, putting on weight and acquiring norks the size of Sputnik, I regularly get what many older/overweight women do - occasional rashes under the breast, which can be very painful. Needs creams/drying carefully/washing bras every day/occasional antifungals. Not nice but a fact of life!
Never occurred to me that it was a thing that could happen for even a moment before I had DD. But I presume that binding squashes things down, and creates a breeding ground for sweat/bacteria/rashes under and around the breast, especially given the fact binders are also hot and sweaty and not easily washed.
So it’s no surprise the side effects include a high percentage of skin infections. This probably includes infected and raw places under the bound breast which are painful, really difficult to treat and can smell bad if not given air/opportunity to dry and heal.
But yay, let’s “treat” dysphoria by giving young women extra things to feel bad about their body for. How stunning and brave!