Sublingual immunotherapy is taken as drops or tablets, containing specific allergen extracts which interact with the immune system to decrease allergic sensitivity.

About 3 percent of babies develop an intensely itchy rash called eczema, often an allergic sensitivity.

Soy based formula may or may not pose a risk of allergic sensitivity, as some infants who are allergic to milk may also be allergic to soy.

But in some cases, adult allergy sufferers have no history of allergic sensitivity.

Some studies have found an allergic sensitivity to guar gum developed in a few individuals working in an industrial environment where airborne concentrations of the substance were present.

Some patients may believe they have determined their own allergic sensitivity from observation, but a skin test has been shown to be much better than patient observation to detect allergy.

These substances are allergenic and contact with them may produce general allergic sensitivity, skin disease, fever, and visual problems.

Nevertheless, someone with a strong allergic sensitivity to dairy products might still react to the dairy residue, and that is why some products that are legitimately pareve carry "milk" warnings.

The allergic sensitivity developed during the previous exposure triggers an immediate reaction to the mites.

In some cases, a person can develop an allergic sensitivity to a product after years of use.