Pistachio allergy

December 23, 2014 | 0

Pistachios are a form of tree nuts are one of the most common allergy causing nuts among children as well as adults. Symptoms can include sneezing, rash, coughing, itching in eyes as well as nausea. One can also show gastrointestinal symptoms and diarrhea. Severe reactions include breathing difficulties, contractions in chest, swollen face and itchy throat. For people with Sinus, pistachios might make it severe by inflammation. It also affects the skin causing hives that are itchy bumps raised on the skin that can increase in size depending upon the allergic reactions severity. Also asthmatic people should avoid pistachios as there could be an increase in the condition due to pistachio allergy such as chest tightening, wheezing and uncontrollable coughing. A person might not be able to perform the ordinary activities as well.

Pistachio allergy rash

Hives and eczema rashes can worsen in such a case even if pistachio is consumed in a minute amount. For those who are allegic, even a little amount of consumption can lead to itchy skin and rash.

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pistachio allergy rash

Other Symptoms of Pistachio allergy

Pistachio allergy mostly attacks the respiratory performance, stomach, and skin and blood flow. There could also be abdominal pain and flatulence with nasal congestion and runny nose. There could also be serious anaphylactic reactions which are usually rare but possible especially if left unchecked. It is signaled by weakening of the pulse, lowering of the blood pressure and dizziness.

Severe symptoms of Pistachio allergy are as follows:

  1. Abnormality in heart rhythms.
  2. Interference with the normal blood flow.
  3. Inflammation and redness of the skin and choking.
  4. Hives: A perpetual skin condition where Hives are raised on the skin like bumps varying in size and shape but are itchy, red and can cause inflammation. They can keep appearing and disappearing from time to time. They usually occur around the hands, mouth, back, stomach and neck.
  5. Worsening of Eczema: If a person is already suffering from Eczema then it might get worse with a pistachio allergy. It is also known as atopic dermatitis which is an itchy skin condition and skin inflammation where red bumps can cause blistering usually appearing on knees, behind the knees and on the arms.


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Diagnosis of the Pistachio Allergy

Nut protein is detected as an allergen through body’s immune system when a chemical called histamine is secreted by the body creating IgE a substance that helps in getting rid of the harmful effects causing discomfort.

  1.  The extract from pistachio is injected beneath the skin to check its reaction. The extract is always diluted. This process is known as Skin Prick Test.
  2. A test called the RAST test checks the level and presence of IgE through a blood test in order to confirm the diagnosis.
  3. One of the most common tests to examine all kind of tree nuts allergic reaction is a Cross Reactivity Test.


In order to prevent such allergic reactions the easiest way is to avoid consumption of the pistachio nuts in any form. Resorting to other nuts such as almonds, pecans and hazelnut could be an alternate but at the same time should be checked for the same reasons. Salted pistachios are even worse so one should always avoid eating these; especially they aren’t recommended for the children. Other sources having pistachios could be candies, chocolates, health bars, cereals, bakery products, cereals, ice creams etc. Even the skin care products such as body lotions, scrubs, oils and shampoos might contain traces of pistachios in a processed form. Packed food such as nut mixes, ready to eat desserts and cakes can have pistachios. Therefore it is crucial to read the contents and allergy warnings before buying them. However it is likely that if one is allergic to pistachios, there could be as similar reaction on consuming other tree nuts such as hazelnut, almonds, cashews, pecans, walnuts etc.


  • The most efficient way to treat this allergy would be to stop consuming all such product that contains pistachios in any form, even the ones that contain pistachio flavoring.
  •  There is however anti histamine drugs that help resolve the allergy effects.
  • One should stick to the respective medications in the case of an asthmatic and sinus reaction due to pistachio allergy.
  • Epinephrine is also injected into the patient to fight the reactions and provide relief. In the case of hives and eczema, one can use medicated skin products and lotions to treat the patches.
  • However it is equally fine to leave them untreated as mild hives also resolve on their own. It is also recommended to stay away from irritating clothes to avoid itching and inflammation.
  • Over the counter antihistamine pills and anti itch cream could be taken to reduce swelling, redness and itching.
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