A bad cough for a month may be caused by cough variant asthma, upper airway cough syndrome, post-infectious cough and other factors.
1. Cough variant asthma: allergic people exposed to pollen, or animal fur and other allergens, easy to cause cough variant asthma, it is easy to cough for a month of bad symptoms.
2. Upper airway cough syndrome: mostly occurring in patients with rhinitis, sinusitis, suffering from these diseases nasal or sinus inflammatory secretions through the posterior nostrils into the nasopharynx, oropharynx and other parts of the pharynx, throat mucosa stimulated by these secretions will appear after coughing, the upper airway cough syndrome is a common clinical cause of cough a month of bad reasons.
3. Cough after infection: such as upper respiratory tract infection, pneumonia, bronchitis, if not treated in time can also lead to a bad cough for a month, may also be accompanied by fever, as well as dizziness, fatigue and other manifestations.
The causes of a bad cough for a month are more complex, patients should go to the hospital in time to solve the disease in time.