Underwire bras are too tight, and compress the lymphatic system of the breast, which causes toxins to accumulate and increase risk for cancer. This is simply not true, and most who have theorized this have been debunked as there is no scientific evidence to prove this. Most doctors and scientists agree that the type of underwear or tightness for that matter have no relation to cancer risk.
Only women with a family history of breast cancer are at risk. Close to 70% of women who are diagnosed with breast cancer have no obvious risk factors for it. Family history does carry risk, especially if its a first degree relative which includes parents, siblings, or children who have had it. Risk can double if this is the case, and it can be even higher with 2 first degree relatives.
Breast cancer always comes in the form of a lump. A lump can indicate a number of breast conditions, which can include cancer. However, this isnt the only way to tell that cancerous changes are occurring. Swelling, irritation, dimpling, pain, redness, scaliness, or thickening of the skin are all typical signs of breast cancer, and are just as much cause for concern as a lump.
If youre at risk, all you can do is watch for the signs. There are a great number of proactive things that women can do to preempt breast cancer besides just waiting for it to happen. Losing weight, getting regular exercise, quitting both tobacco and alcohol use, and having regular exams are just a few of the ways that women can stay ahead of the curve.