Final answer:
Accumulation of keratin debris in the external auditory canal can cause blockage, temporary hearing loss, increase the risk of ear infection, and lead to discomfort and itching.
Step-by-step explanation:
The effect of keratin debris accumulation in the external auditory canal can lead to several issues. Primarily, it can cause a blockage of the ear canal, which may result in a temporary hearing loss due to conductive interference. This blockage can also create an ideal environment for bacteria, potentially increasing the risk of developing an ear infection, known as otitis externa or swimmer's ear. Affected individuals often experience discomfort and itching, which can progress to symptoms such as redness, pain, swelling, and in severe cases, fever. The accumulation of keratin and the subsequent symptoms underscore the importance of maintaining ear hygiene to prevent complications that impair auditory function and overall ear health.