What's the harm of drawing with a gas mask?

This is also your question, which has been answered earlier. But after summarizing your problem, I think the working environment should be good. Make sure you have a cotton filter first.

Besides, it's not that you don't smoke, and other painters don't wear gas masks. You are not as good as them, but because of the principle of boiling frogs in warm water. You are just engaged in the paint industry, so you are sensitive to the taste of paint. In addition, benzene poisoning and inhalation of harmful substances in paint are a long-term process, and the whole incubation period is long. After a long time, problems such as cough and lung infection will naturally appear. Protection related knowledge can be found in Baidu:/question/983845082741484019.