Functional nose and nasal disorders involve structural or inflammatory issues that impair airflow, breathing, and sinus drainage. Common conditions include septal deviation, turbinate hypertrophy, nasal valve collapse, allergic rhinitis, and chronic sinusitis. Symptoms may include congestion, snoring, mouth breathing, headaches, reduced smell, or exercise-related breathing difficulty.... https://www.barokoplasticsurgery.com/specialties/functional-nose-nasal-disorders