Sorry, I wasn't talking about permanent damage. I was thinking of bruises, rashes, fungi underneath the boobs, discomfort from ill fitting bras, tissue migration,back pain, shoulder pain from too tight straps, etc. I've pretty much disliked bras and didn't think much about them, except they were uncomfortable. I'm part of the "bra-burning generation" and I was happy without them and only wore them when needed. I found them so uncomfortable that after I retired I quit wearing them at home. However, that wasn't always comfortable either. I thought I was wearing the correct size but unknowingly I wasn't. Thanks to the internet, pictures of me looking dumpy in ill fitting sports bras and looking like pictures of my great-greatmother at age 80 I started understanding that all the ills I had suffered over the years had a lot to do with my bra fit, cups being to small (underwires pressing on tissue) and my band being too big.
Unfortunately, most women don't understand bra fit and the American bra industry doesn't help with limited sizing and poor fitters. Currently, the only brand I can find that fits me is a UK brand and my size is not sold in stores or boutiques. I've spent a lot of time, trial and error, and money trying to figure out what a good bra fit is on me. If I hadn't found that 1 brand I'd have to resort to alternations or custom made bras. It's a shame that a woman of my age, 64, never had a well fitting bra until now. Sadly, I know I'm not alone.