Daytime dry cough may be caused by respiratory infectious diseases, allergic cough, chronic pharyngitis and other diseases, need to be treated for specific causes. 1. Infectious diseases of the respiratory system: such as colds, acute tracheobronchitis, etc., due to the infection of pathogenic microorganisms lead to inflammatory reaction of the respiratory mucosa, thus causing cough. Due to the poor sensitivity of the body after deep sleep at night, cough is not easy to appear. If the dry cough is serious, cough suppressants such as dextromethorphan can be used; if combined with bacterial infection, antibiotics such as cefixime can be used for treatment. 2. Allergic cough: irritating cough caused by daytime exposure to dust or allergic substances such as pollen, mainly dry cough. Generally, it is necessary to clarify the allergens and keep away from allergens. If the symptoms are severe, anti-allergy drugs such as loratadine and cetirizine can be used for anti-allergy treatment. 3. Chronic pharyngitis: If the patient has chronic pharyngitis, it can be manifested as when the throat is stimulated by the external environment, there will be throat itching, dry cough and other symptoms, you can use compound borax solution, compound chlorhexidine gargle gargle or take throat tablets to relieve the symptoms. There are many diseases that cause dry cough during the day, if the symptoms are not relieved or aggravated, it is recommended that patients seek medical attention in a timely manner, need to take the appropriate medication under the guidance of a doctor, so as not to delay the condition.