Prevention:

Symptoms can sometimes be prevented by avoiding known allergens. During the pollen season, people with hay fever should remain indoors in an air-conditioned atmosphere whenever possible:

• Most trees produce pollen in the spring.
• Grasses usually produce pollen during the late spring and summer.
• Ragweed and other late-blooming plants produce pollen during late summer and early autumn.

For people who are sensitive to certain indoor allergens, dust mite covers for mattresses and pillowcases are recommended, as well as avoiding culprit pets or other triggers.