This condition of alternating nasal congestion in the nostrils is more common clinically, and there are two possibilities, one is physiological and the other is pathological. The so-called physiological situation, generally is the nostrils when sleeping consciously appear a kind of alternating blockage, prompting people to turn over, this is conducive to sleep and help relieve fatigue; the other is the inflammation of the nasal cavity caused by a pathological nostril alternating nasal congestion, some accompanied by nasal headache, dizziness, sneezing, runny nose. This belongs to a chronic rhinitis performance, generally early symptoms are relatively mild, you can use appropriate medication, you can use topical budesonide nasal spray nasal spray, oral rhinitis drugs, such as chamomile capsules. Most of them can be relieved, if the effect of medication is not good, you need to take a look at further examination, and some need surgical treatment.