I have dust mite allergy and had infection-prone sinuses for years and lived with a chronic feverish feeling. I recently had FESS, using endoscope blades to clear passages. I slept great for a few weeks and then allergic symptoms came back again giving me muscle aches and a racing heart. So I wake up unrested. My Huawei band says I get recommended amount of deep sleep but deep sleep continuity is lower than recommended. I am waiting for the dust mite SLIT vaccine to kick in, it could take a year more. Till then I'm trying to isolate the mites in bed.