Last night I put some Olbas Oil on a tissue and put it inside the pillowcase so it would keep me decongested as I slept. Fine. But in my sleep I must have shifted so my face was right on it and the heat from me enlivened it, and I woke up convinced my face had set on fire in the night.
Or maybe I just hallucinated that bit. Nightnurse does funny things to my brain.