Seasonal allergies are just that; POLLEN allergies that spring up seasonally. Pollen is a fine coarse powder responsible for plant reproduction, and whether it comes from trees, grasses, or weeds, it can cause a variety of symptoms. Some people sneeze, or have a runny nose, others may experience itchy eyes, and a sore throat, and sometimes people will cough, or have clogged ears, hives, fatigue or a headache.Tree pollen causes most spring allergies, which can flare up anywhere from January to May, depending on where you live. And grass pollen causes most late spring and early summer allergies. Grass allergens in Northern and colder climates vary, while Bermuda grass is the main cause in warmer Southern climates. Contact with pollen from these grasses also can result in itching and hives, which is known as contact urticaria. As for late summer and early fall allergies, WEED pollen is typically the main cause. Depending on the area of North America, these weeds include ragweed, sagebrush, pigweed, tumbleweed and cocklebur. Interestingly, pollens that are spread by INSECTS, such as those from brightly colored flowers, don't usually trigger allergy attacks. If you think you have seasonal allergies, you should go see an allergist. A skin or blood test will be able to uncover the cause of your symptoms. And there are many treatments available to ease the symptoms or reduce or prevent the allergic reaction. For more information on allergy testing and treatments, check out other videos on this site.