I recommend you listen to this. the good Dr rattles off all the symptoms and illnesses that are known which can be caused by face mask usage.
He also lists those with pre-existing conditions or illnesses that makes compulsory face masks even more harmful (was surprised at a few listed such as bipolar, schizophrenia, manic depression and the like)
RE: The Face Covering Directives of Western Australia are Self-Contradictory - Thanks To The Media & The Politicians.