Man... it also happens with me... before i start to smoke, i had several respiratory alergies, my nose was frequently blocked, my throat would itch awfully, and so... and after i started to smoke this symptoms lessened very noticeably...
In my own case, i think weed makes my nose and throat a bit numb, so i dont feel the allergic itch... also, i think it relaxes my face muscles, and it seems to help to unblock my nose...
Weed is a miraculous plant indeed! :rastasmoke::jointsmile: