29 Tested Home Remedies for Poison Ivy. Poison ivy is a very common skin allergy, caused due to plants, such as poison ivy, poison oak, and poison sumac. These plants release a sticky and oily substance, called ‘urushiol’, which is an allergen. It develops red and itchy rashes on the skin in around 12 to 48 hours of its exposure. The severity of the rashes depends on the quantity of urushiol that your skin gets touched with. Poison ivy can be really itchy and irritating. The blisters.........
