Perfumes are a very common trigger for migraines for people who get them. For me it's the number one trigger. Strong expensive perfumes are some of the worst for me.
I have to avoid indoor crowds or eating out during times when people will be out with lots of scents on. I take drugs before a wedding etc and leave as soon as I can. The best ones are outdoors.
In business I have bypassed interviewees who wore perfurme/cologne to the interview in favor of less qualified canditates who didn't. I have also dropped suppliers, vendors, dealers etc.. because they showed up to a business meeting wearing a cologne/perfume.