Certainly snorting antifreeze could give your nose stuff some color. But why the clotshots would affect the sinuses alone would be unexpected. Certainly the graphene (carbon) in the shots could react with any number of things and produce colors, but sinuses only would still be curious.
The blue color suggests silver to me. Does she do anything, supplements, colloidal, etc. or even jewelry that contain silver? Does she let a silver spoon set in something she drinks that might be acidic? If possible it would be informative to zap a dry sample with a spectrograph. That might show what metal is there?
Melian has the loved one with blue sinus discharge. Maybe ask her about that stuff. 😌