Strong odors can sometimes trigger or worsen nausea. For individuals with hyperemesis gravidarum, a severe form of pregnancy-related nausea that affects about one in every 100 pregnancies, certain scents have been shown to intensify symptoms. In a study, scents such as coconut, sesame, menthol, chocolate, ginger, peppermint, lemon, garlic, banana, and fish were identified as particularly problematic.
While this condition heightens sensitivity to smells, anyone can experience nausea from strong odors, whether caused by cooking aromas, specific foods, perfumes, or chemicals.

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