Use of underwire bra

I don't know if that's true but there is a school of thought (and maybe urban legend) that metal underwire bras 'attract' radiation. People got more concerned after 9/11 when more people were getting scanned at airports by more sensitive equipment. But there are plastic underwires that avoid that possible risk. I'd avoid any unduly constrictive anything on the chest in general just in case.

Hello @marykaym63

I found your question interesting and I did some research and found an article on the Susan G. Komen website titled, Factors Not Related to an Increased Risk of Breast Cancer. Here is the link, https://www.komen.org/breast-cancer/risk-factor/factors-that-do-not-increase-risk/.

Have you asked your doctor about this?

I would think any bra that was tight “could” interfere with lymph fluid. It won’t cause breast cancer as @hopeful33250 pointed out. If I were having lymphadema issues, I might try a little self experimenting to see if it helped or not by changing types of bra. I don’t wear underwires anymore, but it is because they are very uncomfortable after the surgeries.
Have you asked your doctor about this?

Yes, I did ask my oncologist. He didn't know of any definitive research that indicated underwires were problematic. There is definitely self reported anecdotal information .

Thank you for that link. The link also answered a question that has come up about the relationship between sugar and cancer.