Categories People Suck Random Why Wearing a Mask Sucks: Blood Oxygen Levels? Post author By TheBlackhairedGuy Post date July 23, 2020 2 Comments on Why Wearing a Mask Sucks: Blood Oxygen Levels? Why do masks feel suffocating if they don’t lower blood oxygen levels? Tags Breathing in a Mask, CO2, Coronavirus, COVID, How to Breathe, Masks, Oxygen