Following delivery, women remain at risk for developing pregnancy-related complications including endometritis, mastitis, and breast abscesses and often present to an emergency department for evaluation. Postpartum infections such as lactational mastitis are typically mild and can be managed conservatively as outpatients. Breast abscesses and endometritis are more severe and can lead to fulminant sepsis requiring intravenous antibiotics and operative source control. The route of delivery is the most important risk factor for developing postpartum endometritis, with cesarean deliveries having the highest risk. Emergency clinicians must be prepared to promptly recognize and treat common postpartum infections and their complications.