People with respitory problems ie: emphysema and asthma, are warned that the wearing of a mask is detrimental too them. It causes a build up of co2 in the lungs thus reducing the amount of oxygen in the blood stream which gives them a shortness of breath making the windpipe restrict which exascerbates the lack of breath. It also causes confusion and mild depressive symptoms. This is a truth told to people with breathing problems.
