How long do you have to be in a moldy environment to cause health problems? Ni used to have asthma but got cured with allergy shots. Breathing tests had been excellent. I visited a small bar for about 4 hours or so in the Hurricane Harvey flood area recently, almost a year later. I don't know anything about the repairs. The smoke wasn't very heavy, moderate. The next day, my lungs were a bit sore. The day after that, I had pressure in my chest, dry I think, coughing and dizziness. Can this be cured if is mold related?