Leukemia can be divided into acute leukemia and chronic leukemia. Generally, acute leukemia will have symptoms such as high fever and bleeding in the early stage, while chronic leukemia will have symptoms such as fatigue and low fever. 1. Patients with acute leukemia will have high fever in the early stage, and the body temperature is usually 39~40℃. In addition, some patients with acute leukemia may have bleeding manifestations such as nosebleed, gum bleeding, skin petechiae, excessive menstruation, etc. Some patients may have intracranial hemorrhage and gastrointestinal hemorrhage in severe cases. 2. Chronic leukemia patients may have weakness, low fever, fatigue, night sweating (abnormal sweating after going to sleep and stop sweating after waking up), loss of appetite, etc. Some patients may also have enlarged lymph nodes and splenomegaly. If the patient has a sudden high fever, fatigue and other manifestations, we need to be vigilant that it is caused by leukemia. It is recommended that the patient should consult a doctor in time, and the doctor will choose the appropriate treatment measures for the patient’s condition. Patients should ensure enough rest and avoid overwork. In addition, the diet needs to eat foods rich in protein and vitamins, such as eggs, milk, apples, green vegetables and so on.