How to remove the toxic gas breathed in the fire scene?

Three years ago, I inhaled smoke from burning plastic in a fire. My saliva was a little dark for two or three days, and my stool was dark for several days. There was no violent reaction in other aspects. At that time, there was no suggestion to go to the hospital. Normally, if you think something is wrong, I will let you watch it again. I don't feel well for the next two years. First, I often feel bloating, poor sleep, peeling forehead for more than a year, dry mouth and bad breath. Many problems are different from before, because I have been coughing for two months recently. This year, I made a TC chest film and found a small nodule with clear boundary in the lung. Now the doctor says it's very small, so there should be no big problem. I suggest nodule resection for half a year. If there is any problem when I grow to more than 8mm, it will be serious. And now there is gastritis, the stomach is not sure whether it is caused by excessive internal heat, and the lungs are more suspicious.

My personal suggestion is that if the stool is black after getting angry, drink plenty of water and shoot it. If not, buy laxatives (the kind you drink before colonoscopy) so that the stomach and intestines will not absorb harmful plastic substances. Lung problems are more difficult to deal with. Note that if coughing for more than a month is still not good, try to do ct instead of X-ray (the nodule is too small to be photographed and easy to be misdiagnosed). If there is no cough, it is recommended to do CT after one or two years. If it's okay, do it every other year for a few hundred dollars at a time. If you have friends who smoke, you should pay more attention. Early detection and early treatment will help everyone.