What happens when neutrophil count decreases?

A decrease in neutrophils may have multiple effects on the human body. 1. It can lead to reduced immunity, making individuals more susceptible to infections by pathogens such as bacteria and viruses, resulting in various infectious diseases, such as viral colds and chickenpox. 2. Depending on the severity of the decrease, varying degrees of non-specific symptoms may occur, such as fatigue, dizziness, and poor appetite. When the absolute neutrophil count falls below 0.5×10^9/L, it is considered severe neutropenia, with a very high risk of infection. 3. It may also affect vascular integrity, leading to bleeding, impair bone marrow hematopoietic function, cause anemia, and even affect liver function, leading to liver damage. Therefore, once a decrease in neutrophils is detected, prompt medical attention should be sought for diagnosis and treatment by a qualified physician.