There are many such work related allergies, each with it's dilemma. One teacher patient of mine had hand allergy due to the use of chalk (I thought we dont use chalk in the classroom anymore!) and another young school girl had allergic conjunctivitis (itchy red eyes) who was also allergic to chalk. She got much better when she went to university. I suppose they don't use chalk there anymore.
Grass pollen allergies are common in farmers and are difficult to manage.
There are also many work-related allergies occuring in factories such as chrome allery of hands (especially in cement factories), work dust allergy (for work that have a lot of dust), paint and turpentine allergy (common in furniture workers) and the list goes on and on.
Lesson: IT IS NOT UNCOMMON FOR YOUR WORK TO CAUSE YOU ALLEGIES
My learning continues.