The main component of sulfur is hydrogen sulfide, which is a low-toxic hazardous chemical. However, the steam produced by sulfur in the process of smoking, as well as the chemical reaction after burning, appears sulfur dioxide as well as industrial sulfur and contains arsenic, which are highly toxic to humans. Especially in the consumption of sulfur-smoked items, it can cause irritation to the human gastrointestinal and respiratory system mucous membrane, and large doses or long-term use can also cause damage to the human nervous system. Mild cases can manifest as dizziness, blurred vision and general weakness, while severe cases can manifest as liver and kidney function damage. Therefore, in daily life, we should carefully identify whether it is smoked by sulfur, generally smoked by sulfur fumigation system items, can have an odor, sour smell or sulfur smell, from the color is more vivid.