The occurrence of asthma and nasal congestion may be caused by common cold, allergic rhinitis, nasal diphtheria, bronchial asthma and other reasons. 1. Common cold: Nasal congestion is a common symptom for patients with common cold, and the possibility of shortness of breath cannot be ruled out for some patients. 2. Allergic rhinitis: allergic rhinitis caused by asthma symptoms, generally more mild, the disease caused by the clinical manifestations of sudden nasal itching, runny nose, nasal congestion and sneezing and so on. 3. Nasal diphtheria: Nasal diphtheria is one of the types of diphtheria, which will lead to nasal congestion, causing open-mouth breathing, and the skin around the nostrils will be eroded, but nasal diphtheria is relatively rare. 4. Bronchial asthma: the typical symptoms of bronchial asthma are recurrent episodes of wheezing, shortness of breath, chest tightness or coughing, and patients often have aura symptoms such as nasal congestion and sneezing before the attack. Individuals with unexplained symptoms of wheezing and nasal congestion should seek prompt medical examination and diagnosis as well as treatment.