I am absolutely allergic to some of the finishing and dying chemicals used in some fabrics. There have been times I walked into a store selling fabric, started to clog up and claw at my eyes and walked right out. This was a store I regularly bought fabric from.
Come to find out, they had just put out a new shipment of cloth.
One more thing. Not everyone shows allergies in the same way. You and I may be allergic to the same thing. You may develop a rash or start to itch. I may have my nose start to run and sneeze.
Achoo. Sniff.
P