White blood cells are very low, all kinds of tests have been done without problems may be certain drugs (such as chloramphenicol, anti-tuberculosis drugs isoniazid, etc.), radiation, hypersplenism and other reasons.
1. certain drugs: long-term application of certain drugs can lead to low white blood cells, such as antibiotics (chloramphenicol, penicillin, etc.), anti-tuberculosis drugs (isoniazid, rifampicin, etc.), anti-viral drugs (ganciclovir, etc.).
2. Radiation: long-term exposure to radiation or objects with radioactive elements can also lead to low white blood cells.
3. Hypersplenism: there are no special symptoms in the early stage, and the spleen enlarges with the progress of the disease, resulting in a significant decrease in the number of white blood cells, red blood cells and platelets in the blood.
There are many reasons why the white blood cells are very low and there is no problem after all kinds of tests, so it is recommended to go to the hematology department of the hospital and get regular treatment as soon as possible and avoid self-medication.