Does blue cheese cause an allergic reaction in some people?

Blue cheese itself does not cause an allergic reaction. However, it can trigger reactions in people who are allergic to milk or mold.

Here's why:

* Milk: Blue cheese is made from cow's milk, so people with a milk allergy can react to it. This reaction is due to a protein called casein found in milk.

* Mold: Blue cheese is characterized by its blue veins, which are caused by the growth of *Penicillium* mold. While this mold is generally safe to eat, some people may be allergic to it.

Symptoms of a milk or mold allergy can include:

* Skin rash

* Hives

* Swelling

* Wheezing

* Difficulty breathing

* Nausea

* Vomiting

* Diarrhea

If you have any concerns about your health, it is best to consult with a doctor or allergist. They can help you determine if you have a milk or mold allergy and provide guidance on how to manage it.