Explanation of nasal cycle
a. The nasal cycle is a normal physiological process where nostrils take turns being more open or congested.

Possible causes of persistent nasal blockage
a. Common causes include allergies, nasal infections, or structural deviations like deviated septum.

Use of Allrite DC tablet
a. Allrite DC usually contains antihistamines and decongestants. It's used for allergy-related symptoms.
b. Use only if prescribed by a healthcare provider.

When to see a doctor
a. Seek medical evaluation if nasal blockage persists, is severe, or is accompanied by other symptoms such as pain or fever.