Final answer:
A pertinent education-related concern in pediatrics with otitis externa is ear hygiene and infection prevention.
Step-by-step explanation:
A pertinent education-related concern in pediatrics with otitis externa is ear hygiene and infection prevention. Otitis externa, also known as swimmer's ear, is an infection of the outer ear canal. It can be caused by bacteria or fungi and is commonly associated with poor ear hygiene or water exposure. Teaching children proper ear hygiene practices and infection prevention measures, such as avoiding excessive moisture in the ear and keeping ears dry, can help prevent otitis externa.