For some people, it seems like every season is allergy season. In the spring, it is the tree and flower pollen; with summer's arrival the tree and flower pollen are joined by grass pollen; and in the fall it is weed pollen. The result? Red itchy eyes that also burn and sting. If you have severe reactions to pollens, the use of air conditioning may not be wise if flare-ups are severe during this time. 2  Consider purchasing a HEPA (high efficiency particulate air) filter. 3  These filter systems are very effective at removing allergens from the air in your room or house.