Matt Erdmann, MBChB, FRCS(Eng), FRCS (Plast) says:
I would suggest that steam (hot) inhalers are meant for general blockage of your nose during a cold or flu and is often used intermittently together with eucalyptus oil or menthol to open up the airways. Cold inhalation is more likely to help with allergies where you need treatment on...
You should ask your surgeon about any particular restrictions following the surgery. In general application of lights masks when they are not exerting any pressure on the nose is permitted by most surgeons.