Spring means warmer and longer days, but for those who suffer from seasonal allergies, it can also mean experiencing symptoms like sneezing, runny nose, itchy and watery eyes, ear congestion, itchy throat, and headaches. One of the most common causes of spring allergies is pollen from trees like birch, cedar, willow, and poplar, as well as from early grasses and weeds. These pollens act as allergens that trigger an allergic reaction in the body, causing your immune system to overreact. Your pharmacist can recommend effective options for dealing with seasonal allergies, including prescribing treatments not available as over-the-counter products.