Internal Medicine comprises a very wide range of medical knowledge about disorders which can afflict the young, adults and the elderly.

An Internal Medicine specialist knows about all the common ways of testing for disorders, such as blood and urine tests and the use of X-rays, and determines which method should be used. He is able to select the correct mode of treatment. Where necessary he looks after his chronically-ill patients over a long period of time, even at home or in a hospice or care-home.