Do you wear a mask and gloves while trimming? It could be a reaction to it. I am allergic to berries that has increased over time and when I even smell them, my face gets puffy. If I touch them I get hives and puffy where it touched my skin. Like any allergy that will cause anaphylactic shock, the more you are exposed to it, the worse it gets. My dealer can't even touch weed anymore with bare hands, he wears a mask when handling it too. He has become very allergic to it over the past 25 years dealing and growing it. I would check it out fdd, this could be the start of an allergy to weed, lol.