Can Allergies Cause Nausea?

Signs of Allergies
Food allergies are the most likely allergies to cause nausea and/or vomiting. A reaction occurs when your immune system overreacts to a food or a substance in a food, incorrectly identifying it as a danger and triggering a protective response.

Why do my allergies make me feel nauseous?

Our bodies can produce too much histamine and, in an attempt to rid our body of a foreign substance, we swell up, get dizzy, have ear congestion, tinnitus and nausea (among other symptoms).

Can allergies make your stomach upset?

The short answer is yes, you can have a food allergy and experience digestive problems. That's because just like with other allergies, when your digestive system comes into contact with something that your immune system views as a threat, it quickly responds by releasing a chemical called histamine.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.