Endocrinology
An endocrinologist can find out if a person has one of these diseases by doing tests. They can test a person's blood to find out if they have too much or too little of a hormone. An example of this is Type 1 diabetes. People who have Type 1 diabetes do not have enough of a hormone called insulin. Endocrinologists usually do not treat patients directly, but give advice to physicians about what how patients might be helped.