I Can Only Breathe from One Side of my Nose Which Changes Day To Day, What's The Cause?

Trauma to the nose can result in a fracture or deviation of the internal portion of the septum known as a deviated septum.  A deviated septum usually causes decreased breathing issues consistently out of one side of the nose.  A tall thin nose with flail upper lateral cartilages can also cause what is known as valve collapse and vestibular stenosis on the internal portion of the nose and is accentuated when trauma occurs to his midthird of the nose.  The breathing issues that occur from side to side consistently changing throughout the day is more likely caused from turbinate hypertrophy, which is caused from a variety of issues such as allergies, altitude, air pressure changes, hormones, and sinuses problems.  The diagnosis of this must be made at the time of the physical examination.

What you are describing is normal.  Throughout the day, one side of the nose will be congested while the other side does most of the breathing.  When breathing, the movement of air through one nostril can cause dryness.  To allow the nostril to remoisten itself, it will become congested and the other side will do the breathing.  This cycle occurs continuously throughout the day