I work in an office in Los Angeles and one of my co-workers saturates himself in self-mixed essential oils before coming into the office. I have serious respiratory allergies and I become congested, start coughing, get a sore throat and splitting headache shortly after he arrives. Several other co-workers have approached him and asked him not to wear the oils because it makes them ill and his response was that they were over reacting and he subsequently encouraged other people in the office to wear his home mixed oils. I have complained to management that these oils are making me ill to no avail. What can I do -- outside of resigning from work? Thanks.