These concerns are cosmetic or appearance related. As such they are not covered by most insurance policies. I always explore possible allergic and environmental problems about all patients seeking nasal surgery. If you are allergic to what is breathed through the nose, irritants will swell your passageways closing off your nose. Avoiding irritants, decongestants, and adding humidification can help with allergic problems.
Allergies can be seasonal.
Partial mechanical obstruction means it takes less swelling before your nose closes off. People with enough chronic irritation even develop overgrowths of the mucosal lining of the nose called polyps. Such overgrowths can also obstruct the nose. Medical treatment can help some allergic problems. Check out what is on the web about allergic rhinitis and the medical treatment of nasal obstruction.