The mechanism for spring and fall allergy is the same but the triggers are different. Spring allergy in Northern California is mainly caused by tree and grass pollen. (Read our article on Central Valley Allerg... continue reading  about  What are the differences between spring and fall allergies in Northern California? Are there different triggers?

I have always recommended using distilled, bottled, or filtered water for nasal rinses. An alternative could be boiling tap water for at least five minutes. Municipal tap water should also be safer than well wa... continue reading  about  I was alarmed by an article about deaths related to using tap water in a neti pot. I have been using only tap water. Should I change to filtered, bottled or distilled water?

The significance of a food allergy test cannot be interpreted out of context. For example, if you had a life-threatening anaphylactic reaction to peanuts but the food allergy test was negative, it would not nec... continue reading  about  I had a food allergy test about five years ago. All the tests came back negative. How long are the tests reliable? Can I still get a new food allergy in the future?

It sounds as though you have done all of the 'self-help' measures you can. I would recommending discussing with your primary care physician or seeking an otolaryngology referral to try other medications that ar... continue reading  about  I've been plugged up for months with allergies. I've used decongestants, antihistamines, and sinus rinses but nothing seems to help. Any advice?

One of two problems is going on here. Either you have ear wax blocking your ear canal (a condition called cerumen impaction), or your allergies won't permit your ears to "pop", meaning that your eustachian tube... continue reading  about  I have spring allergies and this year I have a plugged left ear, which I’m attributing to this. I’ve been using the over-the-counter ear wax remedies which have been working a bit for a day or two, and then my ear becomes plugged again. What can I do?

A cold will typically start with a sore throat, then lead to thick yellow or green mucus and possibly a cough. The symptoms last about seven to 10 days. Allergy symptoms include itchy eyes and throat, and clear... continue reading  about  My 6-year-old daughter has recently been sneezing, coughing and is tired. How can I tell if this is caused by allergies or if it's a common cold?

Dust mite allergy is diagnosed by obtaining a positive history (yours sounds suspicious) and having a positive allergy test (skin or blood) to dust mite. Pollen (plant) allergy would have similar symptoms but w... continue reading  about  How would I know if I have a dust mite allergy? Sometimes when I'm cleaning the house my eyes start to itch, I sneeze, and my asthma kicks in. How would this type of allergic reaction differ from a plant allergy? Is there anything I can do about it?

The only way to know for sure if this is an allergy is to have allergy testing. Winter allergies could be caused by any of the indoor allergens - dust mite, mold or animals. If this is allergic reaction and Cla... continue reading  about  In winter my allergies get worse. My doctor thinks it's from mold and dust mites, and told me to take Claritin, which I'm doing. But it only works for a few hours, and then I'm sneezing and itching again. Is there anything I can do to prevent this?

The long term treatment of choice for seasonal allergies is the now over-the-counter nasal sprays, like Flonase or Nasacort. Note that there is no immediate relief from them - they work slowly, over several day... continue reading  about  I struggle with seasonal allergies and take Claritin, plus use a neti pot. This season, I have also had shortness of breath and light coughing, but no wheezing. It's hard to do my usual workouts. Is there some kind of inhaler I can use?