There are many different types of pneumothorax (PTX), and the management paradigm has shifted in recent years as the research has exploded on this topic. This topic is additionally complicated by the development of multiple diagnostic tools now available for diagnosis as well as variable sizing algorithms used around the world. Institutional resources and specialty services may further dictate the management of PTX. This post aims to broadly cover the types of PTX, the diagnostic modalities available, and the ideal management by PTX type in the Emergency Department.