Poison Ivy is the oil that causes allergy explains Monica Ponce, Physician Assistant with Sunset Dermatology, who adds the first time people come into contact with the allergy, they don’t react, but this first time is the one that will sensitize them to it.
She describes, the immune system forms a protective reaction for the next time. Reaction to poison ivy is internal and this is more dangerous, she affirms.
The specialist adds the oil of poison ivy can cause a reaction lasting few weeks.