Low blood oxygen levels are treated with oxygen therapy, which involves delivering oxygen through a face mask, nose tubes, or endotracheal tube, which is inserted into your windpipe (aka trachea).

Does wearing a mask cause a drop in blood oxygen levels? No. Doctors wear masks for very long periods of time, even all day, in lots of cases. Masks are designed to be breathable, and there's no ...

Participants wore oxygen masks in three beard conditions: clean-shaven, short beards under about 0.4 inches in length, and long beards over 0.4 inches. Their blood oxygen levels were continuously ...

A recent study has provided strong evidence that beards do not interfere with the effectiveness of oxygen masks for airline ...