Hi - go to
Buteyko Technique Education and Forum and try the free childrens asthma exercise. ie free download of an exercise for children that will unblock your nose.
The process that your nose follows in becoming blocked is the same [in this paradigm] that causes asthma. So the same exercise that reduced asthma symptoms by 90% in hospital trials has a strong impact on the swelling of the smooth muscles in your nose/sinus.
If you have an infection in your sinus - see your doctor.
This is my first post in this forum - and I want to be clear that the site above is mine. There is more free info at nqnet.com about the buteyko method, including an article on how to unblock your nose.
To get the free exercise you have to register, and you will be offered an ebook that I wrote in 1996.. BUT - for the purpose of seeing the immediate change in your nasal swelling - the free chapter is all you need, and you can unsub straight away.
Cheers
James Hooper