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Doctor insights on: Nut Allergy Hives

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Have hives - suspect pecan allergy. Now stopped all tree nuts. If it is tree nut allergy, how long might hives continue to appear?

Have hives - suspect pecan allergy.  Now stopped all tree nuts.  If it is tree nut allergy,  how long  might hives continue to appear?

Days to weeks: You have done a great job of hopefully identifying the cause--nuts. Now, you need to wait days to weeks to allow your body's histamines to get back to normal. One way to speed this process up and prevent more release of histamines, and thus, more hives, is to take a daily antihistamine such as zyrtec (cetirizine) 10mg every day until you are hive-free. If still having issues, in 3-4 weeks, see a dermatologist. ...Read more

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Dr. Paul Carter
69 doctors shared insights

Nut Allergy (Definition)

Nut allergy is a condition where the immune system reacts to exposure to nuts, often with difficulty breathing, swelling, hives, nausea, vomiting, and diarrhea. Typically one is allergic to all forms of tree nuts, including Brazil nuts, cashews, chestnuts, hazelnuts, macadamia nuts, pecans, pine nuts, pistachios, and walnuts, but not to ...Read more


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What is a nut allergy?

What is a nut allergy?

Allergy to nuts : A nut allergy is an allergic, meaning IgE-based immunological response to foods commonly called nuts, which include peanuts (really legumes), tree nuts like almonds, pecans, walnuts, macadamias, hazelnuts, Brazil nuts, cashews, pistachios, as well as sometimes seeds like sunflower "nuts". Symptoms include itching, hives, swelling, throat closing, flushing, asthma, shock and rarely, death. ...Read more

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How did i form my tree nut allergy?

How did i form my tree nut allergy?

Great question: Unfortunately, the exact reason people develop nut allergies is unclear. It is likely a combination of being genetically predisposed and environmental exposure. One theory is early exposure to lotions or oils containing nut protein applied to infants who have thin skin or eczema. The nut protein is absorbed and body senses it as "abnormal" and make allergic antibodies. Why in adults? Not sure. ...Read more

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What could cause a tree nut allergy?

What could cause a tree nut allergy?

Genes & environment: The tendency to develop allergies to foods & other innocuous environmental things is inherited. Allergy to tree nuts & peanuts probably occurs because exposure is too low during the critical period when the infant's immune system is sorting out self from dangerous stuff & foreign but safe stuff. Allergists currently think that early exposure to tree nuts might prevent allergy to these foods. ...Read more

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How can someone outgrow a tree nut allergy?

How can someone outgrow a tree nut allergy?

Not likely to clear: As a child the odds of a tree nut allergy clearing are one in five. As an adult less than that. ...Read more

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Is it possible to outgrow my tree nut allergy?

Is it possible to outgrow my tree nut allergy?

Not likely: Tree nut allergy is very rarely outgrown, especially at the age of 44. ...Read more

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Is there any treatment for a nut allergy?

Is there any treatment for a nut allergy?

Sort of: There are experimental treatments, but nothing that is widely available. Avoidance is the mainstay of treatment at this time. ...Read more

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How is nut allergy testing, de-sensitizing done?

How is nut allergy testing, de-sensitizing done?

Orally in small incr: Nut desensitization is still not approved by the fda. Nut allergen is given orally in progressively larger doses, starting from a dose that does not cause systemic reactions. Progressive doses cause a desensitization, actual tolerance after discontinuation of daily doses may or may not develop. Standardized extracts for use in practice are not in use today. ...Read more

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What happens if i eat almonds if I have a tree nut allergy?

What happens if i eat almonds if I have a tree nut allergy?

No, you shouldn't: It largely depends on what type of tree nut allergy you have, and if you are allergic to several tree nuts. It's important to know that there is a 33% chance of cross reactivity among tree nuts. There is also a possibility of cross contamination, since many manufacturers process other nuts in the same proximity. Safest options is to avoid all tree nuts. ...Read more

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Can you tell me is it safe to go to a pub with a nut allergy?

Can you tell me is it safe to go to a pub with a nut allergy?

It depends: If you have lief-threatening even to a little dust of nuts in the air, you should not go. If you can be near other people who eat nuts and peanuts (peanuts are not nuts, they are legumes), you are probably going to be fine as long as you don't eat them. Still, have self-injectable epinephrine and an antihistamine with you IF you had severe reactions in the past. ...Read more

Dr. John Chiu
2,491 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


Dr. Katharine Cox
3 doctors shared insights

Hives (Definition)

Also known as urticaria, hives are an outbreak of red bumps or wheals that appear quickly after exposure to certain allergens (foods, medications, other substances). Hives vary in size, are itchy, can burn, and can last for up to ...Read more