My 5-year-old boy has a deep and persistent cough, and last night he woke up crying, telling me his ear hurt. Could it be an ear infection?

It is possible that your son's earache is caused by a buildup of secretions from his nose and throat, which can travel to the middle ear through a small canal called the Eustachian tube. This can increase pressure in the ear and cause pain. It is suggested to try to clear out the nose and middle ear using a specific technique provided in a document. Additionally, using a nasal spray may help open up the nasal passages and Eustachian tube to help drain the secretions. If your son develops a fever or continues to experience ear pain in the next two days, it is recommended to seek medical attention.