Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain persistent
dry cough with some phlegm can be due to conditions like
Allergic reaction to some unknown allergen, Allergic
bronchitis etc..
I would suggest you to take a course of anti allergics like Levocetrizine or benadryl along with cough suppressants containing
Dextromethorphan and
Guaifenesin..
You can also take mucolytics ike Ambroxol..
You should also avoid exposure to excessive dust and pollution..
Do steam inhalations and use a humidifier in your room..
Drink warm water throughout the day..
In case if there is no relief in 15 days consult an Otolaryngologist and get evaluated..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..