Clear quartz is very good at boosting the immune system. Also, because clear quartz generates so many healthy negative ions it's good for counteracting aire-borne allergies and for clearing up the respiratory, bronchial and nasal passages. There are a lot of other things that are helpful in the home to get rid of things that cause allergies, such as water fountains, burning bamboo charcoal, beeswax candles, small potted pine trees, and mechanical negative ion generators. You can do a google search on negative ions and will get lots of helpful information. But for outside I'd recommend wearing clear quartz over the throat chakra for the respiratory problems, and clear quartz at the ears to help the itchy eyes, runny nose and ringing or cotton-wool feeling in the ears.