Ear itching during an upper respiratory infection, such as a cold, is a common symptom stemming from interconnected anatomical pathways. The Eustachian tube, a canal connecting the middle ear to the back of the throat, plays a crucial role in equalizing pressure and draining fluid from the middle ear. When a cold causes inflammation and congestion in the nasal passages and throat, this swelling can extend to the Eustachian tube.
The subsequent Eustachian tube dysfunction hinders proper drainage and ventilation of the middle ear. This can lead to a buildup of fluid and pressure, irritating the sensitive lining of the ear and triggering an itching sensation. Furthermore, inflammation can stimulate nerve endings in the ear canal, contributing to the discomfort. This symptom, though often mild, can be quite bothersome.