Oak Trees are big in height and found in 600 extant species. During Spring, Oak trees are fulfilled with leaves and sends oak pollen into the air. Oak trees normally pollinate in March, April and May, with more pollen appearing in the early morning hours. Oak pollen allergy symptoms are like other pollen allergies. While most symptoms of oak pollen allergies are mild and self-limiting, serious allergic reactions can occur. The allergy that happens due to oak trees is known as Allergic Rhinitis and commonly called as Hay Fever is a reaction caused by inhaling airborne particles, such as pollen.