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Why Is A Mango Like Poison Ivy?

By Dr Weaver
Tuesday, May 15th, 2012

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mango allergyDid you know that mangoes and poison ivy are related?

As you are probably well aware, contact with poison ivy can cause rashes and itching.  The type of skin reaction that occurs can range from localized fine red bumps to severe itching and blisters in those individuals who are highly allergic to it.

Poison ivy allergy represents a version of what is called delayed hypersensitivity.  Allergic reactions that you might experience of this type can usually be linked to a specific ingredient that is responsible for the symptoms and irritation that develops. You would usually find that this type of reaction usually shows up 48 or 72 hours after your exposure to the substance that triggers the response.

In the case for poison ivy plants, the chemical that is responsible for allergic sensitivity is called urushiol. After exposure to this chemical, most commonly by contact with the leaves of the poison ivy plants a reaction sequence is initiated that progresses to the classical skin rash and itching that occurs.

The urusiol chemical is also present in the rind of the mango.  By eating a fresh mango in a way that the lips are in contact with the rind, the skin can come in contact with the urushiol chemical. If are allergic, this can lead to itching and swelling of the lips along with a fine bumpy rash.  In more extreme cases, the eyelids can become swollen and shut and the rash can spread to other areas of the face if you happen to be an individual highly sensitive to this ingredient.

The good news in all of this is that while the sensitizing chemical is present in the rind, it is not contained in the fleshy part of the fruit itself. Therefore you would be ok to eat the fruit without coming into contact with the potentially harmful chemical.

So, when eating fresh a mango, if you have any known sensitivity to poison ivy, you should avoid eating the fruit directly from the rind.  Otherwise, if you are sensitive to urushiol, as mentioned earlier, it can cause a rash with itching, swelling, fine bumps or blistering around the mouth.  If you know that you are very sensitive to poison ivy, then you would be at higher risk for the severe reaction where the eyelids can become puffy, and swollen to the point that your eyes are closed.  When this type of reaction occurs, you would require urgent medical attention.

In addition to cross reacting with poison ivy, mango may cross react with cashew nuts as well as various respiratory allergens including, birch pollen, celery, and carrot.

So, enjoy your mangoes, but….. be wary of the rind!

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Categories : Uncategorized
Tags : mango allergy, mango rash, mango related to poisin ivy

Comments

  1. Crystal Lewis says:
    June 19, 2012 at 5:00 pm

    What is the best treatment for minimizing and eliminating itching symptoms caused by contact to the mango fruit’s rind? Thank you.

    Reply
    • Dr Weaver says:
      June 19, 2012 at 5:08 pm

      The rash and symptoms associated with mango sensitivity usually respond to treatment with topical steroids and oral antihistamines. 1% Hydro-cortisone which is available without prescription would be good to try first. If this doesn’t work something stronger can be prescribed.
      Dr. w

      Reply
      • Ron Torngren says:
        April 6, 2013 at 12:03 am

        I suffered with a severe rash when I came in contact with poison ivy many years ago when I was a kid. I came in contact with mango leaves several years ago and my skin reacted in much the same way. I avoid my wife’s mango tree and have be reluctant to eat mangos as well.

        Reply
        • Dr Weaver says:
          April 10, 2013 at 11:49 am

          Once you develop the type of allergy you mention, the sensitivity is lifelong. The chemicals that cause the mango sensitivity are usually located in the rind. So, as long as you just eat the part of the fruit that is not the rind you would usually be ok.

          Reply
    • Mandi says:
      May 31, 2013 at 3:37 am

      Thanks for posting this!!! I so enjoyed the very ripe organic mangos I bought but now my lips are swollen and I have a mild rash on one side. I am highly allergic to poison ivy and next time will be wary of the rind. 🙂

      Thanks again!!!

      Reply
  2. John says:
    June 30, 2014 at 10:54 am

    I have always shown a sensitivity to poison ivy and poison oak. Then as a soldier in the Philippines was sucking the juice from mangos right off the tree and had terrible rash that spread all over. Several years later I learned what had caused it. Beware.

    Reply
  3. Justin says:
    August 3, 2014 at 6:08 am

    Really great article and very informative. I’ve had a mysterious allergic reaction three times where my eyelids and surrounding tissue would fill with fluid and shut. This most recently occurred last night. I ate a mango off the rind before bed and woke up this morning with the symptoms I mentioned above. It finally dawned on me that the other two times I’ve had this reaction I was also eating mango off the rind. This whole time I’d been thinking it was a severe reaction to seasonal allergies. I’m allergic to poison oak so it makes sense that mangos would bother me too. For anyone wondering all three times my Dr prescribed me an oral steroid (prednisone). It worked really fast and reduced the swelling noticeably within a couple hours.

    Reply

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