What is a common treatment for hay fever symptoms?

A common treatment for hay fever symptoms is antihistamines, which work by blocking the action of histamine, a substance in the body that causes allergic symptoms. When someone with hay fever is exposed to allergens like pollen, their body produces histamines, leading to symptoms such as sneezing, runny nose, and itchy eyes. Antihistamines effectively reduce or eliminate these symptoms by preventing histamines from binding to their receptors, providing relief for those suffering from seasonal allergies.

The other options do not effectively treat hay fever. Intravenous fluids are typically used for hydration or to administer medications in more critical medical scenarios, but they do not address allergic reactions. Cold medications may provide temporary relief from nasal congestion or sinus pressure, but they are not aimed specifically at allergies and often contain ingredients that may not be suitable for hay fever. Exercise, while beneficial for overall health, does not have a direct impact on alleviating hay fever symptoms.