Caution: These 5 plants trigger allergic reactions!

Especially when gardening, hiking or playing outdoors, many adults and children come into contact with different plants. However, some of these can trigger different types of  contact  allergies, which can show up as reddening of the skin, hives, rashes and pain. There can be mechanical reactions from injuries from thorns and prickles, as a result of which chemical plant substances can irritate the skin or wound. Phototoxic reactions, which can only occur in combination with sunlight, are particularly dangerous. You should therefore avoid the following plants.

1. Bear’s claw or Hercules perennial in combination with UV radiation

With the  giant hogweed , also known as Hercules perennial, special care is required: the plant sap contains phototoxic furocoumarins and must not be touched without protective clothing or gloves. The ingredients cause a severe phototoxic reaction when exposed to sunlight. This is shown by:

  • wheals
  • redness
  • inflammation

2. Mechanical reactions by roses

Spines and thorns of different plants, for example roses, can lead to injuries to the skin. These are responsible for mechanical contact reactions, as bacteria or plant sap can enter the wound.

3. Spurge responsible for chemical skin reactions

Spurge  juice  contains histamine and acetylcholine, among other things, and can cause severe skin reactions. The juice should not come into contact with the eyes, as it can cause serious damage to health.

4. Cup primula: triggers of contact allergens

The ingredients of the plants can act like allergens in combination with the body’s own proteins. As a result, skin reactions such as wheals and rashes can develop, which can become noticeable up to 24 hours later.

5. Garlic carrot causes bad skin reactions

In addition to hogweed, cartilage cartilage can also lead to phototoxic reactions, which can cause severe skin damage comparable to  burns after up to 24 hours  . These plants can also cause major health damage when they come into contact with UV radiation:

  • Engelwurz
  • lemon plants
  • bergamot
  • rue


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