Coughing despite normal blood counts may be caused by environmental irritants, adverse drug reactions, allergies, tuberculosis, chronic lung disease, etc. 1. Environmental irritation is a common cause of cough due to inhalation of irritating gases such as fumes, while blood counts are not abnormal. 2. Adverse drug reactions, some drugs can cause dry cough, such as captopril. 3. Allergies, especially acute allergies, may cause coughing in the early stages, but the blood count may not have changed significantly yet. 4. Tuberculosis, also a common cause, dry cough is a typical symptom, and tuberculosis usually does not show significant changes in blood counts. 5. Chronic lung diseases, such as chronic bronchitis, etc., part of the relatively mild condition of the population does not appear routine changes, but may be accompanied by cough symptoms. Coughing despite normal blood counts may also be due to other causes, which need to be clarified after medical examination and treated according to the doctor’s instructions.