High absolute value of neutrophils can be seen in acute infection, tissue injury, acute hemorrhage, acute poisoning, leukemia and other conditions, which should be analyzed with specific circumstances. 1. Acute infections, especially purulent cocci such as Staphylococcus aureus, Streptococcus pneumoniae and other infections, will lead to neutrophilia, often with fever and symptoms of the infected area, such as lung infections can be coughing, coughing up pus sputum, skin infections can be localized redness, swelling, heat, pain and so on. 2. Neutrophilia may occur after severe tissue injury such as trauma, major surgery, extensive burns, acute myocardial infarction, usually with the history of the above acute injury, it is not difficult to identify. 3. 1~2 hours after acute hemorrhage, neutrophils will be elevated; patients may have decreased blood pressure, decreased perfusion such as irritability, oliguria, and cold extremities; there may be a history of obvious trauma, gastrointestinal hemorrhage with symptoms of vomiting blood, black stools, or history of cirrhosis of the liver. 4. Acute poisoning, such as diabetic ketoacidosis, expiration may have rotten apple odor, blood glucose is obviously elevated, there is a history of diabetes mellitus; acute lead and mercury poisoning, sleeping pill poisoning, etc. may also have elevated neutrophils, which should be combined with the history of exposure to the relevant poisons and toxicity analysis to determine. 5. Leukemia, myeloproliferative neoplasms can also cause elevated neutrophils, peripheral blood leukocytes can reach tens of thousands or even hundreds of thousands, and naïve cells can be seen; at the same time, there can be unexplained fever, anemia, thrombocytopenia, hepatosplenomegaly, emaciation, malaise and other systemic symptoms. To summarize, when the absolute value of neutrophils is found to be elevated, it is necessary to go to the hospital for a clear diagnosis and take appropriate treatment.