How Long Until Poison Ivy Rash Appears: Doctor’s Advice

The Poison ivy plant is common in most parts of Asia and North America, but since it’s also found in all US states, chances are that you will cross paths with it at least once in your lifetime. And if you do – and get to touch it, it won’t be a pleasant experience.

Poison ivy rash can be irritating and painful and pretty scary. Today, we have decided to find out how long until Poison ivy rash appears, what are the symptoms and when should you seek medical assistance.

If you have been exposed to urushiol (the oil in poison ivy), the rash typically appears within 12 to 72 hours, though it can take up to a week for first-time sufferers.

What is Poison ivy?

While the Poison ivy is most commonly mistaken to be an Ivy, it actually falls into the cashew and almond family, making it even harder to identify the plant if you are not entirely sure about it.

The plant also looks different in certain parts of the world and will vary in color and shape.

But there is one golden rule I always repeat to my hiking buddies: “Leaves of three, let it be.” The leaves always grow in clusters of three.

You can usually identify poison ivy easily in the fall because its leaves turn a bright red compared to the brownish color of other trees.

The leaves turn green or yellowish again in the spring and summer months. The color of the leaves directly indicates the maturity of the plant, with darker green indicating a more mature plant.

Which part of the Poison ivy is actually poisonous?

The Poison ivy plant itself is not poisonous, but inside the leaves and the plant, you will find a substance called Urushiol, which is what causes and spreads the allergic reaction and rash.

You will notice a reaction once the plant is damaged. Since the leaves are fragile, the slightest bump or brush against them can dislodge this resin and transfer it to your skin.

And I need to be completely clear here: every single part of the plant contains urushiol. This includes the roots, stems, and berries. Ingesting any part of the plant is highly dangerous and can cause severe internal reactions.

How does the rash spread on the body?

While it does look that the rash spreads on your body, that is not what is happening. So a myth you might’ve heard – that the blisters help spread the rash as they hold resin from the plant – is wrong.

Instead, here is what happens: certain parts of your body might have received higher doses of the allergen, or your skin there is thinner, making it look like the rash spreads. At the same time, thicker skin or areas with less oil will break out days later, giving the illusion that the rash is moving.

The only wat you can spread the oil is if it is still on your hands or under your fingernails right after touching the plant and you touch other parts of your body. This is why washing properly is incredibly important after getting in contact with poison ivy.

Symptoms of poison ivy

The symptoms vary from person to person. Many people will only show symptoms the following day, which fuels the myth that you can contract Poison ivy rash from simply being close to the plant or even from someone else.

The main symptom is a red rash appearing on the skin, where the poison ivy sap touched you. Usually, this redness will be associated with pain. Depending on how much poison ivy sap you had on your skin, the pain will be mild or intense.

After a while, the infected area will start swelling up and this will be the tell-tale sign that you have been in contact with real Poison ivy.

After the swelling begins, you might start noticing blisters. It is best not to pop these blisters to avoid secondary bacterial infections.

You will see symptoms between 12 to 72 hours after contact. The more resin you were exposed to, the faster the symptoms will start to appear and the more you spend with that oil on your skin, without washing it, the more severe the rash will be.

See also: Can You Eat Poison Ivy? Learning to Build a Tolerance

If you happen to be in an area where poison ivy is burning, you might inhale smoke from the plant. The tiny plant particles in the air are full of resin.

When inhaled, this leads to severe internal respiratory reactions. Should you suspect this and have difficulty breathing, get emergency medical treatment immediately.

A warning about pets

Dogs (or other pets) are generally immune to the poison ivy rash because of the fur that protects their skin.

However, the same fur can hold urushiol (the bad oil from the plant) if they run through a patch of poison ivy, for example. If you pet them later, that oil transfers to your hands and you will develop the rash.

So if you suspect your pet has wandered into a patch, give them a thorough bath wearing thick rubber gloves.

Can Poison ivy be washed off?

Yes, if you manage to identify Poison Ivy correctly and you wash your skin quickly, you can indeed wash it off. The resin usually takes between 10 and 30 minutes to penetrate the skin, but the infected area can be washed off with cold water.

Ideally, use some sort of soap to properly wash it away – since it’s an oil we’re talking about, simple water takes longer and might not be as effective. But if that’s all that you have, it’s better than nothing.

IMPORTANT! Do not use warm water initially, as warm water causes your pores to open, which could help the oil penetrate faster.

Should the resin be on your clothing or work tools, it is also recommended that you wash these tools and clothing to ensure that they can be handled again as the resin can remain active on clothing and tools for up to 1 year.

When to see a doctor

While a standard rash is not life-threatening and symptoms will eventually disappear, there are a few cases when you should visit the doctor to ensure you are safe.

You’ve inhaled the smoke of burning Poison ivy

One of these symptoms which should push you to visit the doctor is when you suspect you might have inhaled or ingested some of the burning Poison ivy plants.

The resin could cause internal damage and swelling and you will need to see a medical professional as this could potentially lead to suffocation. Should you be short of breath or struggling to get air in your lungs, you should see the doctor.

The swelling doesn’t stop

Another possible reason to see a medical professional is when the swelling continues for too long. As the swelling continues, the pain will also set in a little more and this could be excruciating at times.

The doctor might give you some form of antibiotics and an ointment to help ease the pain and to stop the swelling.

The rash has infected your eyes, mouth or nose

The eyes, mouth, and nose are extremely vital to the body and they need to be taken care of, but sometimes, you might not know that you still have some of the resin on your hand and then when you wipe through your face with your hands, the resin could infect these vital areas.

Should you feel any pain associated with the current rash you have from the infection or if you notice any swelling that starts in these areas, you need to seek medical care or treatment immediately.

If the infection affects the nose, it could seriously impair breathing and spread upward in the nasal cavities and then to the throat area.

If the mouth is infected, the swelling could cause excruciating pain and you might not be able to drink water or even talk and this could be fatal if not treated, but the eyes are probably the worst place to have the resin infect and this could even damage the eye itself, which could lead to impaired vision and even blindness if left untreated as the resin burrow deep into the skin and affect the retinal areas of the eye.

Blisters oozing pus

The pus that these blisters might sometimes ooze out can actually allow the infection to spread to various other areas and it is fundamental that you visit a doctor to have them stop the oozing from the blisters.

We did already mention that the resin can still be active for about 1 year and if the resin is not killed off by the body, it could possibly start a new infection and this could be extremely harmful.

You can read my dedicated article on how to make a blister heal faster.

Fever higher than 100 degrees Fahrenheit

If you are sure that you have been infected by Poison ivy and you start contracting a fever, it is important to keep this in check and regulated.

If the fever keeps on rising, it is recommended that you visit a doctor or even the emergency room for a thorough check up and to allow them to possibly break that high fever.  Fever can be fatal if ignored.

Enjoy the outdoors, but watch out for Poison Ivy!

Poison ivy can be found almost anywhere in Asia and especially North America and since many of us do love the outdoors, it should not be a reason to stay indoors. Backpacking and hiking trips can be a great breakaway and the additional camping trip for the family will ensure everybody gets to enjoy nature’s relaxation.

You should study up on the Poison ivy to ensure that you know how to avoid them and how to read the symptoms associated with them. This could possibly save your life in the wild outdoors.