Has anyone ever heard of a severe sudden headache being triggered by the smell of strong mouthwash? My husband uses a very strongly odored mouthwash that I find fairly awful. Yesterday, I smelled it from downstairs and after I went in the bathroom, I had a bad headache within 5 minutes. I get headaches often (clusters). BTW, my husband, tough guy that he is, says that bad smells never hurt anyone, so I'll never convince him!