Clean Environment and Avoid Allergens
Always maintain a clean environment to avoid allergens lying around your surroundings. When you have guest over, they can carry all forms of allergens into your home; hence, it is best to clean up properly from time to time to prevent coming in contact with such allergens.
Once you have discovered that you are allergic to certain substances, you should steer clear of them. If you are allergic to poison ivy or oak, the responsible thing to do is never to be around them long enough for them to cause you arm.