I'm allergic to birch pollen, so it won't be long until those itchy eyes kick off again. My worst experienc was when I worked in Sweden for a number of years. So many birch trees there that when it rained in pollen season, the puddles had a yellow scum on them I went to the Doctor's in desperation, and showed my tablets, nasal spray and eyedrops, none of which were working very well. The Doc then asked me to return that afternoon, when he gave me a steroid injection. Within 24 hours all my symptoms had gone. A rather extreme solution, which it is not advisable to resort to on a regular basis, but I was most grateful at the time.