Try not to touch your eyes. It may seem hard to do, but your hands carry many germs and irritants that can get into your eyes and cause issues. You should also never scratch your eyes. If you must touch or rub your eyes, make sure your hands are clean and that you handle them gently.
People who have allergies often have red and itchy eyes. Be careful to avoid rubbing them because that will only make the problem worse. If you have seasonal allergies you can take medication to prevent the symptoms, and you can also use allergen-reducing eye drops. Make sure to follow the directions for the eye drops to avoid future problems.