What is causing nasal inflammation/post nasal drip for multiple people in the same house?

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What is causing nasal inflammation/post nasal drip for multiple people in the same house?I live in a house with many family members. Coincidentally, my father, my brother, my grandma, and I all have nasal inflammation or post nasal drip. I bought an air purifier and have it running 24/7. I also do nasal rinse bottle every night. However, mucus keeps on forming at the back of my nasal passage. I also have tonsil stones. I know they are all related. My question is, is there something in the house causing all this (we have been in this house for over 10 years)? like the paint on the wall or the food we eat or may be too many electronics running in my house? How can it be possible for almost everyone in the house has the same problem and we never seem to able to stop the problem no matter what we do?

Kelle
normally mold somewhere. - basement?

John
It appears that you have something in the air that is continuing to irritate your respiratory system. I am sorry to report that many air purifiers on the market are quite ineffective, so unless you spent $ 600 or more on your air purifier, it may not be doing anything more than increasing your electricity bill. Take a look at the options available at http://www.allergy-relief-air-purifier.com/ and see if those units are more applicable to your needs. Another important step is to try to trace down any source, like dust or mold, that needs to be cleaned up or encapsulated before you clean your airborne dust. Also, make sure to keep your humidity around 40-50% by using table-top humidifiers. If you have a central unit attached to your furnace, shut it off and stop using it. The central units are costly, high maintenance, likely to cause mold in your ductwork and otherwise quite ineffective. I hope this helps.

Helpful answer below. Tonsillitis explained | Better Health Channel
Links to information about tonsillitis , including tonsillectomy.

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