Neither colds nor bronchitis cause external auricular neuralgia. Colds and bronchitis are two different diseases. Colds are a type of upper respiratory tract infection and bronchitis is a type of lower respiratory tract infection. Colds are characterized by nasal congestion, runny nose and fever, while bronchitis is characterized by coughing and phlegm, which may be accompanied by fever. Neither of them causes auricular neuralgia. The causes of auricular neuralgia may be inflammatory diseases of the ear, including otitis externa and otitis media, etc. Some neoplastic diseases of the ear, including malignant tumors of the outer and middle ear, may also cause auricular neuralgia. When auricular neuralgia occurs, it is important to consult a doctor in time to clarify the cause of the disease and treat it, so as not to delay the condition.