At the University Hospital of Wales, prof. Rebert Mansel and Frenchay Hospital of Bristol Dr. Simon Cawthorm found that by a research.
Wearing bras caused to chest pain. This chest/breast pain will directly relate to breast cancers. Some anthropologists prove from researches breast cancer is a problem only in cultures where women wear bras.
Tight bras congest lymph nodes. Lymph node is a vital unit of human immune system. Human immune system hold a large part to stop spreading cancers.
Therefore women who wearing bras all time or considerable time have to consider this thoroughly.