Problem:
A 20-year-old female presents to the Urgent Care clinic after experiencing a temperature of 101.2F and new onset of a rash, which is pictured below. She denies any recent sick contacts or travel. Her past medical history includes seasonal allergies and bipolar affective disorder. She takes cetirizine (Zyrtec) as needed and quetiapine (Seroquel) but adds that her mental health provider just added another medication to address her depressive symptoms but cannot recall the name. Based on this information provided and general knowledge of dermatological conditions that can occur in psychiatry. What is your initial diagnosis, the most likely etiology of the patient's presentation, what should be the first intervention to treat this condition and what labs would you recommend obtaining to determine the level of management needed to care for this patient?