Christmas Trees are fun to look at, but it is affecting some people negatively. There is something called “Christmas Tree Syndrome” where trees can trigger an allergic reaction that results in possible wheezing, cough, congestion, sore eyes and maybe even life-threatening asthma attacks.
You can prevent some of this from shaking out the dust and pollen from the tree. However, that doesn't stop mold from forming. Up to five times the norm after you water your tree up to two weeks.