(NEXSTAR) – You may have managed to dodge the dreaded rashes often associated with poison ivy, poison oak or poison sumac, ...

Poison ivy, along with poison oak and poison sumac, has an oily coating called urushiol, which often causes redness, swelling ...

Here's a little help on what to avoid in your garden or on a walk and how to identify poison ivy, poison sumac and poison oak ...

Poison sumac plants tend to do the opposite; they can grow outside swamps but do like those swampy areas better. That said, if you're still not sure what you're dealing with, don't touch it.

Another poison ivy relative, poison sumac is a flowering shrub or woody plant that contains the same oil. However, it is considered more allergenic as it results in a very inflamed, painful, and ...

Contact with anything that touched the poison ivy, oak or sumac can cause a rash within 12 to 72 hours. These include pets, clothes, tools, shoes or a hiking backpack.

If you've never received a rash from poison oak, ivy or sumac, the rash could last 21 days or longer. If you have had the rash previously, it will last one to 14 days.

Scrub good. There is no cure for poison ivy, poison oak or poison sumac. An antihistamine can lessen the itching as can calamine lotion or a hydrocortisone cream. Aloe vera is also good.

Meanwhile, poison sumac looks different because it has clusters of seven to 13 smooth leaflets arraigned in pairs. It grows as a tree, and when fully grown, it can reach up to 20 feet tall.

The staghorn sumac is a sensory delight, from its toothed leaf edges to its fuzzy fruit and young stems. Though it is related to poison sumac, a staghorn can be handled without fear.

If you've never received a rash from poison oak, ivy or sumac, the rash could last 21 days or longer. If you have had the rash previously, it will last one to 14 days.