Hello there we understand your feeling and your condition. There are many reasons for the blockade of one Sided nostril. It might be because of increases size of the nasal tribunals or it might be the deviation of the nasal septum or it might be co.gesturing if one sided nasal mucosa. You need to consult one ENT specialist for your help. Track one in your locality and consult him as soon as possible. Thank you.

Hello There are cushions inside the nose which we call them turbinates, that help in moistening the air we breathe. These cushions swell up during an attack of cold or allergy. That's when you feel blockade of nose. Do steam inhalation . also you can benefit using nasal decongestant drops. Take orally decongestants like levocitrizen at night for a week. Take care