medinose has been the very best treatment I've come across, my dc2 uses it aswell. it uses light waves to desenistise the nose. (had hayfever for 20 odd years used steriod injections, all the tablets, steriod sprays plus acupuncture, homeopathy, local honey - even tried a nose filter)
Plant spray from local garden centre, fill with water then fix onto fine mist setting and spray all over yourself, furniture, family, pets, windows etc. you don't get hayfever when it rains.
vasaline/balm smeared up nostrils and across eyelashes
nasopure is brilliant -looks very weird, they've used netipots in India for a couple of thousand years, I tried the traditional ones but found this one is more powerful at washing all the pollen out. If too strange to contemplate then I recommend sterimar
Last resort is shower and wash hair, change clothes
hope it helps