This time of year grasses growing in the fields are heavily pollinating. These pollens are light and are carried by even the slightest breeze. They tend to stay airborne for a long time. Unfortunately for people that are allergic to grass this exposure often causes severe allergy symptoms. Some of the symptoms you will see are: Stuffy nose, runny nose, sneezing, itchy/watery eyes, postnasal drip, and cough.
One thing that can help is to keep the windows in the house shot and run the air conditioning to keep the pollens out of the house.
We recommend that you talk to your doctor about long term and effective treatment for your grass allergies.