A normal human white blood cell count is (4.0-10.0) x 10^9/L, below this value is considered low white blood cells. With low white blood cells, immunity and resistance are reduced, making you susceptible to infectious diseases. The role of leukocytes is to engulf foreign substances such as bacteria and viruses and to produce antibodies. When the body has fewer leukocytes, the body’s ability to defend itself against “foreign invaders” is reduced, which is reflected in a decrease in immune function, and usually results in non-specific manifestations such as dizziness, low fever, fatigue, loss of appetite, and insomnia. When bacteria and viruses invade the body, they are prone to infectious diseases, such as acute respiratory infections, urinary tract infections, and even fatal diseases such as sepsis, septicemia and infectious shock. In addition, lowered white blood cells also predispose to mouth ulcers and skin fungal diseases. If you have low white blood cells, you should eat more protein-rich foods, such as eggs, milk, and lean meat, and eat fresh vegetables and fruits in moderation. Take drugs that raise white blood cells to supplement nitrogen sources, synthesize body proteins, and enhance immune function.