Review Question - QID 109749

A 6-month-old boy is brought to his pediatrician by his parents. The patient's parents state that he has a rash on his head that has persisted for the past month. They fear that it may have become infected and are seeking treatment. The patient is a healthy boy who was born at 39 weeks. He has been meeting his developmental milestones and is breastfeeding. The boy produces 7 stools per day and responds to his name. His temperature is 99.5°F (37.5°C), blood pressure is 60/30 mmHg, pulse is 120/min, respirations are 17/min, and oxygen saturation is 98% on room air. On physical exam, you note a healthy young boy. His cardiopulmonary exam is within normal limits. Physical exam reveals the finding seen in Figure A. Which of the following is the most appropriate next step in management?