Pediatric dry cough without fever may be caused by physiological factors, but also due to allergic cough, bronchitis and other respiratory tract infections. 1. Physiological factors: when the environment is dry, exposure to poor air quality or easy to sleep with the mouth open at night, the respiratory mucosa will be in a drier state, causing symptoms of dry cough. 2. Pathologic factors: (1) Allergic cough: It is often caused by exposure to allergens in the environment, including pollen, dust mites, and animal fur. Exposure to allergens induces intractable cough. (2) Bronchitis and other respiratory infections: repeated infections by bacteria and viruses can induce bronchitis, affecting the local bronchial mucosa to produce an inflammatory reaction, stimulating the airways to trigger a dry cough and other symptoms, and then gradually coughing up sputum and so on. Children do not have a fever dry cough, may also be cough variant asthma and other diseases (such as pneumonia, acute laryngitis), it is recommended that when the symptoms appear, go to the hospital, to clarify the specific cause of the disease, standardized treatment under the guidance of the doctor.