Emergency medicine is a division of medicine that is trained in a hospital emergency department, in the field, and other locations where first medical treatment of illness takes place. Just as clinicians work by immediacy rules under huge emergency systems, emergency physicians base their follow on a triage system. Emergency medicine focuses on diagnosis and treatment of sharp illnesses and injuries that need immediate medical attention. While not typically providing long-term care, emergency medicine physicians and pre-hospital workers still provide care with the aspire of improving long-term patient outcome. In the United States, several people use the emergency department for outpatient care that could be provided at a doctor's office. As a consequence, much of emergency room care is common practice (coughs, colds, aches, pains).

"Emergency medicine is a pasture of practice based on the information and skills required for the avoidance, diagnosis and management of acute and vital aspects of illness and wound affecting patients of all age groups with a full range of undifferentiated physical and behavioral disorders. It additional encompasses an understanding of the development of pre-hospital and in-hospital emergency medical systems and the skills essential for this development." An alternative of an Emergency Department is an Urgent Care Center, often staffed by physicians, nurses and nurse practitioners who may or may not be properly trained in emergency medicine. Urgent Care Centers offer handling to patients who desire or need immediate care, but who do not attain the acuity that requires care in an emergency department.

Emergency Medicine involves a huge amount of general medicine but involves almost all fields of medicine counting the surgical sub-specialties. Emergency physicians are tasked with seeing a huge number of patients, treating their illnesses and admitting them to the hospital as essential. The subject requires a broad field of information and advanced technical skills often including surgical procedures, trauma resuscitation, advanced cardiac existence support and higher airway management. Emergency physicians preferably have the skills of many specialists, the aptitude to manage a difficult airway (anesthesia), suture a multifaceted laceration (plastic surgery), treat a mind attack (internist), work-up a expectant patient with vaginal bleeding (ob / gyn), and end a bad nosebleed (ENT). By and large, no other field prepares a physician to deal with all of the over, and in several ways, the emergency physician is a "jack of all trades".