Human inhalation of hydrogen sulfide can cause acute poisoning and chronic damage. Acute hydrogen sulfide poisoning can be divided into three levels, mild poisoning, moderate poisoning and severe poisoning, different degrees of poisoning, its clinical manifestations have obvious differences. Mild poisoning is characterized by photophobia, tearing, eye stinging, foreign body sensation, runny nose, burning sensation in the nose and throat, etc. Examination shows conjunctival congestion, dry rales in the lungs, etc. In addition, there can be mild dizziness, headache, weakness, moderate poisoning is characterized by immediate dizziness, headache, weakness, nausea, vomiting, **** Jejunya, etc., and there can be a short-lived impaired consciousness, and at the same time, it can cause respiratory mucosal irritation and eye irritation symptoms, and examination can show that it can be seen in the respiratory mucosa. At the same time, it can cause respiratory mucous membrane irritation and eye irritation, and the examination can see dry or wet rumbling in the lungs, conjunctival congestion and edema. Severe poisoning is manifested by obvious central nervous system symptoms, firstly dizziness, palpitation, dyspnea, slow action, followed by irritability, blurred consciousness, vomiting, diarrhea, abdominal pain and convulsions, rapidly enter into coma, and finally death due to respiratory paralysis. When exposed to very high concentrations of hydrogen sulfide, "electric shock-like" poisoning can occur, and the exposed person suddenly collapses and stops breathing within a few seconds. Long-term repeated inhalation of a certain amount of hydrogen sulfide can cause olfactory loss, as well as the emergence of neurasthenia syndrome and vegetative nerve dysfunction.

People suffering from obvious respiratory diseases, organic diseases of the nervous system, mental illness and severe neurosis, obvious cardiovascular disease, should not engage in hydrogen sulfide operations.