What instruction should a nurse give to an adolescent with recurrent external otitis?

The recommendation to instill a diluted alcohol solution into the ear after swimming is grounded in the goal of preventing moisture accumulation that can promote the growth of bacteria or fungi in the ear canal. After swimming, water can remain trapped, providing an ideal environment for infections to occur, especially in individuals prone to recurrent external otitis. By using a diluted alcohol solution, it can help to evaporate any residual moisture and create an unfavorable environment for pathogens. This method serves as a preventative measure and is practical for adolescents who may participate in activities like swimming where exposure to water is common.

The other options do not align with effective management strategies for this condition. For instance, using cotton swabs for cleaning can actually push debris further into the ear canal and may cause injury. Advising avoidance of swimming entirely could limit the adolescent’s social and recreational activities unnecessarily, while taking antihistamines may address allergic responses but does not target the underlying risk factors associated with external otitis.