Hay fever, also known as seasonal allergic rhinitis, is just one term used to describe seasonal allergies. Seasonal allergy symptoms appear at specific periods of the year, mainly when trees, grasses, and weeds release pollen into the air to fertilize other plants. Spring brings flower buds and blossoming trees, but it also brings sneezing, congestion, a runny nose, and other irritating symptoms for the millions of people who suffer from seasonal allergies. Pollen counts are ...