Thanks for the question.
Most common cause of these symptoms is viral URI and there are many viruses which can cause that.
The typical of them is it can take up to 1-2-3 weeks for these symptoms to go away.
Most recommendations are in favor of conservative treatments
1-If there is no fever, phlegm, blood, no need for further testing or antibiotics
2-If the symptoms last beyond 6-8 weeks, there is need for evaluation of underlying lung disease including asthma.
3-i would suggest to use over the counter cough meditations for example Robitussin DM, etc as needed
4-green tea with lemon, honey and ginger is advised.
I hope that helps,please feel free to ask if you have any follow up questions, if you are satisfied , please click ACCEPT and rate the question,with positive feedback, thanks