A stuffy, runny nose, burning eyes and a nagging headache are bad enough on the ground. But when you're flying in the system—and can't just pull over at a rest stop—allergy problems become compounded. If you follow the IMSAFE mnemonic, you should be OK. But if allergies are a constant issue and you need to go places, putting up with allergies are just a part of life as a pilot.
This is a companion discussion topic for the original entry at https://www.avweb.com/flight-safety/healthy-pilot-4-hampered-by-hay-fever