Treat the underlying problems.

Supplementation for the thyroid one, cleaning up your domestic environment to eliminate dust mites for the dust allergy. (Use a Dyson or Vax - get rid of old bedding and carpets - no rugs or carpets in the bedroom - turn off central heating and open the windows to let the house get cold enough to kill the buggers - etc. etc., there must be lots of advice about managing dustmite allergy out there on the web).

Don't eat kiwifruit, they contain a protein which usually cross-reacts with dustmite allergen.