hi.. thanks for using HCM..
you have chronic sinusitis
, and your ENT sugeon has adviced FESS.. but you are denying it..
you have asking for nasal douching with the salt water?.. can try this, along with this do pranayama, yoga
, and exercises, see how it works.. if it doesnot, follow your ENT surgeons advice for FESS..
all the very best..