How does feverfew (carrot weed) cause allergic contact dermatitis?

Updated: Jun 10, 2021
  • Author: Glen H Crawford, MD; Chief Editor: Dirk M Elston, MD  more...
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Feverfew, or carrot weed, is an unwelcome plant, which is also known as the scourge of India. This species has developed a wide ecologic niche in India after it was accidentally imported with a consignment of wheat from the United States.

The Indian plant contains large amounts of sesquiterpene lactones (SQLs) and produces a severe widespread dermatitis, which occurs predominantly in men. The dermatitis resembles ragweed dermatitis. [7, 8, 9]

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