The relationship between the olfactory system and the brain is powerful. Some smells (good or bad) may elicit an unpleasant reaction. In fact, we are all born with different sensitivities to smell.
If the smells start to give you a headache take a little break or try chewing mint gum. If your discomfort persists, we recommend sitting a few rounds out.
Note: For future gameplay, we recommend approaching the infamous stank cards with caution.