I have had bronchitis for more than a month

Condition analysis:
There are reasons for bronchitis. Only a check can give you the correct answer.

Instructions:
If normal anti-inflammatory treatment does not work, so you have to consider whether there is the possibility of mycoplasma infection or allergic asthma. Try to have mycoplasma resistant treatment or anti-allergy treatment. In addition, check whether you have tuberculosis infection or chronic pharyngitis, and tonsillitis.

Useful Tips:
I suggest you must stop smoking, wine, spicy food. Drink plenty of water or drink honeysuckle tea. It's important that you take something to prevent the recurrence.