Nose breathing brain feel oxygen insufficient common causes of chronic rhinitis, colds, chronic obstructive pulmonary disease, different causes of different treatment methods, it is recommended to consult a doctor in a timely manner, the common treatment methods are general treatment, drug treatment, and so on. 1. Chronic rhinitis: it causes edema and congestion of nasal mucosa, which makes patients have poor breathing and causes symptoms of oxygen deficiency. Nasal sprays such as budesonide can be used as prescribed by the doctor, which can effectively reduce the swelling of the nasal cavity due to inflammation and allergy. Vasoconstrictors, such as hydroxymetazoline hydrochloride, can also be used to improve nasal ventilation. 2. Colds: Colds can cause a lack of ventilation in the nose and a feeling of lack of oxygen for breathing. If the symptoms are mild, just a slight runny nose and sneezing, you can do a good job of keeping your body warm and drink plenty of boiled water. If the symptoms are serious, you can take antipyretic and analgesic drugs, such as nimesulide; antiviral drugs, such as ribavirin; and nasal decongestants, such as furosemide nasal drops, as prescribed by the doctor. 3. Chronic Obstructive Pulmonary Disease (COPD): Chronic pulmonary dysfunction caused by obstruction of airflow in the trachea and bronchi. The performance of the nose breathing, the brain feels insufficient oxygen, frequent coughing, wheezing and coughing phlegm, shortness of breath and other symptoms. Treatment: Stop smoking and alcohol, inhalation of bronchodilators such as terbutaline and ipratropium bromide to relieve symptoms, and application of expectorants such as acetylcysteine. Nose breathing brain feel oxygen insufficient situation, it is recommended to consult a doctor in time, diagnosis and clear treatment.