From the Research
Yes, oral allergy syndrome can cause nausea in some individuals. Oral allergy syndrome (OAS), also known as pollen food allergy syndrome, primarily causes immediate allergic reactions in the mouth and throat when certain raw fruits, vegetables, or nuts are consumed. While the most common symptoms include itching or tingling of the lips, mouth, and throat, some people may experience gastrointestinal symptoms like nausea, vomiting, or abdominal pain, as noted in a study published in 2020 1. These symptoms occur because the proteins in certain foods are similar to pollen proteins that trigger allergies. When someone with pollen allergies eats these cross-reactive foods, the immune system mistakes the food proteins for pollen and triggers an allergic response.
Key Points to Consider
- The symptoms of OAS can range from mild to severe and may include systemic reactions, such as anaphylaxis, as discussed in a recent review 2.
- Diagnosis involves a clinical history, skin tests, and, in ambiguous cases, double-blind, placebo-controlled oral food challenges, as outlined in a study from 2023 2.
- Treatment primarily involves avoiding trigger foods, which can help prevent nausea and other symptoms associated with OAS.
- For persistent or severe symptoms, antihistamines may help, and carrying an epinephrine auto-injector is recommended for those with more severe reactions, as suggested by research from 2014 3 and 2019 4.
- Consulting with an allergist can help identify specific trigger foods and develop an appropriate management plan, taking into account the individual's medical history and the severity of their symptoms.