What's cause my blocked nose?

I have be living with one trunk blocked for quite a long time. It happen that whenever one nose open, the other one blocks. This usually changes side whenever I rest on the sides, the lower one blocks and the upper one open. Is this a medical condition? Specialists please.What's cause my blocked nose?
allergic rhintis (nasal allergies) if both your nostrils block alternately or if it was of late the same one nostril other blocked, it would be a deviated septum. I would go see a ear, feeler and throat specialist.
Sounds like you are have trouble with your sinuses - jump see doctor - might be allergic to something,
My daughter had hers cleaned out a few years ago.
I honestly don't want to terrify you, but, you should go to the doctor or a snout, throat specialist. My neighbor's nose be doing this and he has an appointment the 5th to progress to a city for a cancer removal of his nose. Good luck. Go immediately.