Low white blood cells are a manifestation of many diseases. There are many causes of leukopenia, and if they are significantly lowered they are prone to co-infections, etc. The main causes of leukopenia can be divided into primary and secondary.
Primary cases are those where the cause is unknown.
Secondary causes include: 1. Drugs: most chemotherapy drugs, such as etoposide, cyclophosphamide, carboplatin, etc.; antibiotics: chloramphenicol, etc.; anti-tuberculosis drugs: isoniazid, etc.; anti-thyroid drugs such as propylthiouracil, etc. 2. Certain bacterial and viral infections: most of them are viral infections. 3. Physical and chemical factors: such as long-term exposure to radiation, poisoning caused by certain physical and chemical factors, etc. 4. 4.Some blood system diseases: common ones such as hypoproliferative leukemia, aplastic anemia, megaloblastic anemia, paroxysmal sleep hemoglobinuria, etc., and most of them can lead to complete blood cytopenia. 4.Connective tissue diseases: such as systemic lupus erythematosus, dry syndrome, etc., in addition to leukocytopenia, complete blood cytopenia can also occur, and it is more common in young women, such as 5. cirrhosis, hypersplenism, etc.: can lead to complete blood cytopenia; 6. others such as long-term malnutrition, chronic wasting disease, chronic osteomyelitis, acute hemorrhage, etc.
In conclusion, a comprehensive analysis should be made to clarify the specific symptoms and other tests and labs.