Black Mucous

i have black/greyish mucous.

I started with constant nose bleed since april 2008.turned out to be sinusitis and allergies.i got my nasal membrane burnt with silver nitrate to stop the bleeding. it took 3 months for the bleeding to disappear completely.i do nasal irrigation if my nose is completely blocked.n i had been taking antibiotics for a very long period.now im much better but i keep having running nose n sneezing all the time.so i keep taking antihistamine n sparying nasonex as advised by doctor.

i got my mucous examined as it was blackish.doctor suspected it to be mold or fungi.The result came negative.i was relieved.and my sinus got much better. but then i keep finding this blackish mucous together with clear one.n seems to have problems with my nose,lots of phelm,n couging from time to time. I'm now very concerned as I read that it might be something related to the lung.

Actually the doctor has asked me to have my lung checked,but i had it last year and it was fine. i'm not a smoker n never snorted anything.i live in United Arab Emirates,Abu Dhabi where it is very dusty as sometimes there's sand storm.but i never noticed this mascara-like  mucous before.i moved here for a year and before i used to live in bahrain for 3 yrs n a half which is pretty much the same environment.so i dont think it's something to do with dust. i only had blackish mucous after a night out,obviously because of smoke in the bar.but i dont go clubbing these days.doctors here are not so reliable n can barely diagnose the sickness.miderneasterns themselves go to hospital in thailand. i'm going back to thailand next month,so i will consult my doctor i've been seeing about this matter again.

for the time being.i couldn't find a possible reason why this is happening n im very concerned.