If the patient has moderate benzene poisoning, there are usually the following symptoms: 1. Digestive symptoms will be particularly typical, such as nausea, vomiting, abdominal pain, especially to the navel around the navel 2cm for the umbilical colic as an obvious symptom, there will also be vomiting accompanied by diarrhea, diarrhea for dilute watery stools, and in severe cases, there will be a mucus pus and blood stools. In addition, moderate benzene poisoning in addition to the obvious circulatory symptoms, such as chest tightness, shortness of breath, palpitations, precordial discomfort. Neurological symptoms, such as dizziness, headache, pyramidal and extrapyramidal symptoms, such as ataxia, etc., and in more severe cases, transient loss of consciousness may occur, and the patient may experience, for example, acute renal failure, oliguria, anuria, and soy sauce-colored urine.