Could an anti inflammatory (nsaid ) cause flushing in the face and is it dangerous?

Drug reactions: Any drug can cause a reaction. Flushing sounds like a drug allergy. If you are breathing ok and feel ok other than the flushing it should pass. However, consult with your primary doctor asap. If there are other symptoms, go to the emergency department immediately.

Possible: Nsaid can cause this but this is uncommon. If the flushing gets worse and you experience other symptoms like wheezing or difficulty breathing see a doctor asap.

Maybe: Nsaids are related to aspirin. If you have an Aspirin allergy there may be a "cross-sensitivity". Flushing is not a usual reaction to such drugs unless an allergy exists.