No fever, but elevated white blood cells and lymphocytes

Fever refers to an elevated body temperature. An increase in white blood cells and lymphocytes without fever may result from physiological phenomena or pathological causes such as EB virus infection, medication factors, etc.

I. Physiological Phenomena

During intense physical exercise, both white blood cells and lymphocytes may increase without accompanying fever. This is considered a normal physiological response and generally does not require special treatment.

II. Pathological Causes

1. EB Virus Infection

The incubation period for EB virus infection is typically 4–7 weeks. Abnormal blood counts commonly occur, and during the prodromal phase, symptoms such as headache, fatigue, fever, loss of appetite, and rash may appear. If no fever is present, it may indicate relatively strong immunity; patients are advised to consume more fresh vegetables and fruits. For headaches, medications such as celecoxib tablets or ibuprofen capsules may be taken as directed by a physician. Physical cooling methods, such as wiping the body with lukewarm water, are recommended when axillary temperature is below 38.5°C. If axillary temperature exceeds 38.5°C, acetaminophen tablets or ibuprofen capsules may be used according to medical advice.

2. Medication Factors

Excessive use of glucocorticoids such as dexamethasone tablets or prednisone tablets can stimulate bone marrow hematopoietic function, leading to abnormal bone proliferation and drug-induced increases in white blood cells and lymphocytes, often without fever.

In addition, elevated white blood cells and lymphocytes without fever may also be associated with hematological disorders. Patients are advised to undergo further examinations to establish a definitive diagnosis. Pathological cases should be treated based on the underlying cause.