Persisitent dry cough
is also a type of presentation of asthma
called `cough variant asthma` and the pain could be because of constant coughing
. Cough could also be due to a condition called GERD or LPR in which the acid from stomach regurgitates upwards into the throat and causes cough. You should get a PFT, blood for AEC and sputum for eosinophils done. Take Montair 10 mgm, levocetrizine 5 mgm and Pantocid
40 mgm. This will be of help.