It is possible that the main title of the report Angioedema, Hereditary is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
If you have hay fever, your doctor will give you a tiny dose of the allergen as a tablet. You let it sit under your tongue and then swallow it. Because the dose is so small, your body won't react.
You’ll get more doses of the allergen on a regular basis so your body gets used to it. Eventually, you should have only very mild symptoms when you get the allergen. Or you may not even have symptoms anymore.
Oral immunotherapy works the same way that allergy shots do, except:
It doesn't require shots. This could make a difference for many people, especially children.