Only a small segment of the population has adverse effects from fragrances. Fragrance is one of the most common causes of adverse reactions to cosmetics. Asthma rates have doubled in the past twenty years. In 1994 there were over 14 million asthmatics. Each year over 35 million people suffer from sinusitis.
Fragrances are general irritants that contribute to the incidence of sinus problems.
Migraines effect as many as 25 million people. Fragrances are known triggers for migraine headaches. Many other health conditions are adversely affected by fragrances. Those with chronic lung disease find exposure to fragrances exacerbate their condition. Those receiving chemo-therapy for treatment of cancer often find exposures nauseating.