Internal medicine is the medical specialty concerned with the diagnosis, management and nonsurgical treatment of unusual or serious diseases. According to some sources, an emphasis on internal structures is implied. Physicians specializing in internal medicine are commonly called, "internists". Elsewhere, especially in Commonwealth nations, such specialists are often called physicians. Because their patients are often seriously ill or require complex investigations, internists do much of their work in hospitals. Formerly, many internists were not sub specialized and would see any complex nonsurgical problem; this style of practice has become much less common. General internists are equipped to deal with whatever problem a patient brings—no matter how common or rare, or how simple or complex. Our General Medicine specially trained to solve puzzling diagnostic problems and can handle severe chronic illnesses and situations where several different illnesses may strike at the same time.