I have that, and there are some places I just cannot stay at. So when I know I'm going to be staying at a place where I get severe allergic reaction, I get some corticosteroid nasal spray, but the ones that are powerful.
A friend of mine has severe allergies to many different airborne materials, to the point where he was having to get shots every few weeks to control them. What finally allowed him to get control over the allergies and not have to get shots anymore was one of these nasal sprays.
