Why do allergy shots reduce symptoms, but not being constantly exposed to another type of allergen?

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Question by CJP: Why do allergy shots reduce symptoms, but not being constantly exposed to another type of allergen?
First of all I’m taking allergy shots, but I’m confused because it doesn’t make sense to me that injecting an allergen can make your body more immune to an allergen whereas constant exposure to allergens (non shot-related) does not seem to be helpful at all.

I’ve heard people say that their pet allergies “went away” after living with a new pet or something, but mine have never done this.

So in a nutshell, why does injecting an allergen through allergy shots help with immunity, while having other types of exposure to allergens make symptoms worse? You’d think if I’m constantly exposed to dust mites, then it’d build up an immunity. I’ve read all kinds of stuff, but I don’t seem to be able to find an answer.

Best answer:

Answer by suzieq_64093
I think it has to do with the shot being injected into the body and it going into the bloodstream faster. I’m not exactly sure either, but this past fall was the best one I’ve had in YEARS. I’ve had just over a year of allergy shots so far. I wish I had done this years ago.

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2 comments on “Why do allergy shots reduce symptoms, but not being constantly exposed to another type of allergen?

  1. Well the allergy syrum in injected directly itto your blood stream and your immune system will eventually not consider them a threat when you breathe them in. Allergies don’t don’t go away. There must have been other factors in play. I take them too and seem to be helping!

  2. Allergies are funny like that. Allergy shots are more consistent and increase exposure gradually. Once your body has an allergic reaction it recognizes that allergen as a toxin. If you can increase a little bit at a time your body will increase it’s tolerance for the allergen. In some cases, constant exposure can alleviate allergies or decrease them. In other cases allergies can become worse with exposure.One good example is poison ivy. Once you have an allergic reaction to it, the symptoms will worsen upon every exposure. Your body is constantly changing as well. Some of us outgrow allergies and sometimes new ones develoip.

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