My son always suffers from dust allergies, any remedies of prevention?

Try to go to other doctors for second, third or even fourth opinion..Better yet seek the help of a specialist with regards to allergies..My son had the same sickness last year and was found to have allergies from the air he breathes..He was given a medicine for allergies and soon enough he was cured and didnt have one eversince..The doctor specializes with pediatric pulmonology..I dont wanna give you any names of the medicine because it was a long time ago and Im not sure of the name either.. Hope your son gets well soon..

You need to build up his immune system...two good things to start with are health food store grade vitamin c and garlic capsules. They will help a lot. Another thing that you should do is to keep his bedroom clean of dust. He spends half of his life in it so it is the easiest environment to control. Put away as much clutter as you can and clean the sheets,blankets,pillows,coverlet every week. Use fragrance free laundry soap. Vacuum each week.
A humidifier can help but be careful because if he has an allergy to mold it can make it worse.
Try a diet free of milk and preservatives.
Have him tested for allergies such as animals(pets) and remember that the allergy that he has is also the microscopic dust mite. If you can keep the house as clean as possible it will help.
I hope it gets better for you and your son!

you need to vacumn your sons bedroom thoroughly and use
a nozzle attachementto vacumn the bed too. wash the bedding
in hot soapy water. this will help get ridof dust mites.
they bother me also.also you might uptake your sons vitamins
'specially vitamin c for better cold resistance.

Is your son better now, you have made this post about 2 months ago.
I notice there has been no further posting responses on it.
If the problem is still persisting, I think you should try some herbal preparations.
Just email me through my website listed in my profile here, if you think you need any further help or advice!
I fully agree that antibiotics should not be used frequently and ought to be avoided when possible!

The first thing I would do is get rid of all the carpet. If you can't get rid of it in the whole house, than at least get rid of it in his bedroom.

Carpet is the worst thing for people with allergies. Ask my cousin cjgrooms about it.

You can never vacuum it enough or shampoo it enough to make it safe for people with allergies.

You will notice a drastic change in the amount of dust you have in your house if you can get rid of it.