The bottom line is........................if you don't take the proper precautions with ventilation and such.......YOU WILL GET SICK!
Whether it be nosebleeds, sinus problems, congestion, migraines, Emphysema, whatever
Am I trying to scare anybody? Yep, sure am. You need to take the proper precautions. I didn't and now wish I did. If you're coughing up a bunch of crap, and/or getting congestion, don't dismiss it as something else. Either stop pouring for two weeks and/or get the proper ventilation and see if it goes away. Keep pouring and ignore the symptoms...........it's on you. You keep breathing those fumes you will get sick. There are plenty of good threads about ventilation systems/masks , etc. Just use the search engine.