Nausea
Nausea is not a particularly typical symptom of hay fever. The symptoms usually relate to the respiratory tract up to the lungs as well as the eyes, as this is where the largest area of attack for the allergy-causing pollen is. The pollen is normally inhaled and settles in the airways. Nausea usually only occurs when the entire body is put on alert because of the pollen. In this way, inflammatory substances are released systemically (in the whole body) to fight the pollen and additionally lead to complaints such as nausea.
Diarrhea
Hay fever is an excessive reaction of the body to substances foreign to the body. The symptoms are usually related to the respiratory tract, as this is where the pollen is absorbed and thus leads to a local allergic reaction. In addition, however, the entire body can be put on alert, which means that symptoms can spread to other parts of the body.
Many people who suffer from hay fever also suffer from other allergies or slight food intolerances. Due to the high alertness of the body, the reaction to other potential allergens, such as certain foods, also intensifies during the hay fever season, so that symptoms such as diarrhea can occur.
