Internal medicine is the specialty that deals with organ systems and diseases; you’ll find it on a doctor’s resume. This can range from understanding common hereditary disorders or finding out if you have diabetes to diagnosing certain cancers on a cellular level. With an increasing number of people living in old age, it’s important for doctors to be able to diagnose diseases earlier in life before they become more difficult and costly to treat. This means you can be treated for something which would have adversely affected your life at a much younger age.