Well, Take a long sigh of relief. There's no need to give up on your favorite B's. American Cancer Society has dropped this fallacy long before. The reality stating the reality to body fluids travel up and into the underarm lymph nodes, not towards the underwire. Some lunatic minds weeded the thought that metal underwires (for all those don't know, its the part that goes underneath the breast providing extra support and push), tight or badly fitting bras can cause compression in the chest area. Compression indeed can prevent the lymph system from clearing toxins and can cause Breast Cancer.Bravo! High five to the Storyteller. I wonder why people are so obsessed with someone's innerwear. Scientific Study Even Science denies the rumor of association of Bra with Breast Cancer. Breast Cancer is actually gene mutations leading to rapid cell divisions and has nothing to do with the lymph system's operations. Don't Trust Me, Trust Science.Experts have ceased the fact that clothing you choose to wear (undergarments included!) does no impact at all on your risk of developing Breast Cancer.