Nature never wastes anything and misuse causes things to go wrong. But preventative removal of breats or anything which nature designed for some purpose or other is like saying remove the head so I never get a headache; or remove the heart and replace with a pump so that I never get a heart attack?? What next?
Cause may be due to pesticide food, lack of physical work, tension, work pressure, no intake of water & right food in right time etc. Reamidy:- PRANAYAMA & DYANA