It is difficult to be sure about the cause of your daughter's cough without being able to see her. However the three most common causes of a persistent cough lasting for 3 weeks in a child of your daughter's age are tracheitis or whooping cough or asthma. Surprisingly all of these coughs are usually dry (not always with whooping cough)and your daughter will not cough up any mucous. With whooping cough there are fits of coughing followed by vomiting. If your daughter's cough started off with a cold, the most likely cause is tracheitis. This is due to inflammation of the trachea or upper part of the airway. A course of a short-acting cortisone such as Aspelone is safe and effective. Your daughter will need a dose of Aspelone syrup of 10 ml once daily for 5 to 7 days. You will need a prescription for the Aspelone so ask your doctor for this.
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