Having read Alison's comment about hay fever, I thought I'd share a little bit of advice and hope it helps her, and other fellow sufferers. I don't often get HF, but this year I've got it quite bad and I've been using a medication called Phenergan (Promethazine Hydrochloride) which is basically a very strong antihistamine and is also used as an effective sedative .It's helping me sleep on these sticky nights and I've noticed a def improvement in the HF since taking them (and heat rash is at bay at present - I get that at the first bit of sunshine!). Another thing worth a try is cider vinegar - I mix two tablespoonsful in a glass of water with a good teaspoon of honey - it certainly soothes a sore / tickly throat anyway.