Seasonal allergy symptoms are at their peak during allergy season in California, especially in regions like Fresno and Merced. Seasonal or environmental allergies, also known as allergic rhinitis or hay fever, occur when the immune system overreacts to common triggers such as pollen, mold spores, or pet dander. An estimated 10 to 30 percent of the global population suffers from these allergies, which can cause a range of uncomfortable symptoms including a persistent runny nose, itchy eyes, and fatigue. These symptoms can disrupt daily life and affect overall well-being.