HI I have gone through your mail, as you said that you are having nasal blockade more on right side and after nasal washing you feel better,you are having halitosis
also, all these symptoms are for last four years. After listening your story it appears that you have some obstructive pathology in your right nose,this can be diagnosed by examination and possibilities are - Deviated nasal septum
to right side, polyp in right nose, Turbinate hypertrophy, sinusitis right side. To pin point the possibilities you should go for these investigations (1) C.T.scan paranasal sinuses
, (2) culture and sensitivity of throat swab. After this you should contact your E.N.T.specialist for complete examination of nose, nasopharynx
, mouth cavity including dental & oral heygine,oropharynx
and laryngopharynx. After this much one can co-relate the examination finding with inferences of investigations than we will reach the final diagnosis and plan for treatment.Thanks.