I just fielded a similiar question on another forum. Sometimes, if you have an intestinal parasite{not uncommon for those with candida} part of the life cycles of these guys is to make passage through the lungs and then down the throat back to the intestines. If you are cleansing, some parasites take refuge in other areas of the body until things calm down. Temporary passage through the airways is not uncommon. I get sudden coughs which I think will lead to a cold or something, but it turns out it is the parasites. They will go up into the nose quite regularily as well. This can cause sneezing and itchy nose--or worst. Shroom