What are the possible problems with concentrating and inhaling expo dry erase markers(even the new ones)? Wife says she does it to relieve headaches. What I know is it gives me headaches, clogged nasal passages, congestion,...etc. to be in the room where she has done it!!! She wants information about problems this will cause, and if there is a better solution to relieve her headaches (other than asprin, ibuprophene or tylenol).