The reason for high blood level in advanced stage of tumor may be the occurrence of infection. The body of patients with advanced tumor is in a state of malignant disease, and the immunity is extremely low, so its patients are very prone to infections, and the common infections are lung infection, urinary tract infection’ and perianal infection. Therefore, these infections are the main cause of elevated blood counts. Infections in advanced tumors have low sensitivity to common broad-spectrum antibiotics; therefore, treatment with potent antibiotics (e.g., imipenem, carbapenems, etc.) is required to effectively alleviate pathogenic infections. Gammaglobulin injection can also be used to strengthen the body’s resistance. The use of the above drugs needs to be under the guidance of a professional doctor. If such a situation occurs, please consult a doctor for reasonable and standardized diagnosis and treatment.