Have you tried Mary Kay or Avon? Also, could it be that there might've been some kind of bacteria that may've gotten in the shadow or on the applicator? Do you wash and/or sanitize the applicator at all? Perhaps that will help if you did. What about trying a new container w/the same shadow?? Are you removing the eye shadow at night w/a hypoallergenic remover too? How about cleansing the eyelid area after removing the makup? It may be the brand too. That's strange that you would start having this reaction after using the same shadow for years. Maybe you just now are developing an allergy to it but I'd try the same shadow, just a new container & see if that helps first & again, consider Mary Kay or Avon. I've never had trouble w/their makup so far & their products are supposed to be hypoallergenic, at least I know MK is supposed to be. Hope this helps, good luck!