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Outdoor Plants That Cause Hives
Outdoor Plants That Cause Hives. There are many plants that can cause hives because different people are allergic to different things. That being said, there are certain plants that more commonly cause an allergic reaction. Knowing what plants commonly cause hives can be beneficial if you or a loved one is prone to allergic reactions.
There are many plants that can cause hives because different people are allergic to different things. That being said, there are certain plants that more commonly cause an allergic reaction. Knowing what plants commonly cause hives can be beneficial if you or a loved one is prone to allergic reactions.
Poison Ivy, Poison Oak and Poison Sumac
According to Medline Plus, plants from the Toxicodendron family, including poison ivy, poison oak and poison sumac, rank among the most common causes of allergic dermatitis. These plants contain an oily chemical called urushiol. This chemical is what causes the allergic rash and it can be transmitted through leaves, air and the surfaces of tools and animal fur.
Stinging Nettle
According to the University of Maryland Medical Center, stinging nettle is a weed that's used in a variety of alternative medical therapies. However, stinging nettle is also know to cause allergic dermatitis in some people. The hairs on the stem of the stinging nettle release a variety of chemicals that trigger the allergic response. Typically, the allergic response and hives develop shortly after contact occurs.
Primrose
Primrose is a plant that is used decoratively. According to Dermanet, the components of primrose that cause an allergic response are primin, primetin, miconidin and quinones. These allergens are present on the hair that's on the plant's stems and leaves.
Chrysanthemum
The chrysanthemum plant is used for herbal and ornamental purposes. According to the Natural Standard, it's a common cause of allergic contact dermatitis. Dermanet lists the sesquiterpene lactones in chrysanthemum as the cause of allergic reaction in people. Allergens are released through direct plant contact, but they can also be airborne.
Peruvian Lily or Alstroemeria
Alstroemeria, or Peruvian lily, is consider among the common causes of plant dermatitis. Commonly used in floral bouquets, Dermanet reports that hives from alstroemeria are most commonly seen in gardeners, florists and housewives. The rash this flower causes is often referred to as "tulip fingers" because patients have red, thickened and split fingertips.
