Thanks for the query
It looks like you have rhinitis
, which is inflammation of the mucous membranes of the nose. Since it has been 6 months it is most likely to be allergic in nature.
I advice to get an absolute eosinophil count
done, if the counts are raised you should be taking an anti allergic like levocetrizine for a prolonged period of time. Please visit your GP for a prescription
I hope I was of help