Which of the following findings should prompt a referral to a professional?

A foreign body in the ear canal is a situation that typically requires immediate attention from a qualified professional. Such an obstruction can lead to complications, including infection, injury to the ear canal or eardrum, and potential hearing loss. Hearing technicians are trained to recognize that any foreign object lodged in the ear should not be removed without proper tools and expertise, as inappropriate removal efforts could exacerbate the problem.

In contrast, occasional ringing in the ears might be a sign of a benign condition like tinnitus, but this does not usually necessitate immediate professional intervention unless it is persistent or accompanied by other symptoms. Minor ear wax buildup can often be managed with over-the-counter treatments or home remedies and is generally not serious. A normal ear canal appearance indicates that there is no need for further action.

Thus, a foreign body presence is a clear indication for a referral to ensure the patient's safety and health are prioritized.