Causes
In the Americas, the most common causes of allergic contact dermatitis are plants of the Toxicodendron genus: poison ivy, poison oak, and poison sumac. Specific plant species that can induce such contact dermatitis include Western Poison Oak, a widespread plant in the western USA.
The alkyl resorcinols in Grevillea banksii and Grevillea 'Robyn Gordon' are responsible for contact dermatitis. Bilobol, another alkyl resorcinol found in Gingko biloba fruits is a strong skin irritant.
Other common causes of irritant contact dermatitis are harsh (highly alkaline) soaps, detergents, and cleaning products.
Read more about this topic: Contact Dermatitis