Having a runny nose while eating could be a result of a phenomenon called gustatory rhinitis, where certain foods trigger a reflex that causes nasal discharge. Spicy foods are commonly known to cause this reaction, but it can also be triggered by other substances like coffee, tea, chocolate, or acidic foods such as tomatoes, vinegar, or citrus fruits. Keeping track of the foods that trigger your symptoms in a journal can help identify the cause of your rhinitis. Avoiding these trigger foods is usually the simplest approach. In terms of medication, a nasal spray could be prescribed to help manage the symptoms if needed.