Why do I need to know my family medical history? Family history is a huge part in deciding treatments for you personally even if you might not have all the same diseases. Many diseases tend to have genetic components that doctors have to consider when deciding what the best course of action for you will be. This can affect what types of medications you may be able to use and what types of allergies that may be present. You should not only be aware for your medical needs but for your families as well. Knowing what sorts of diseases or disorders run in your family can help you make decisions on how to live the healthiest life you can. For example, if you know diabetes runs in your family, you can make the decision to eat healthy, low carb foods and exercise regularly. Understanding your family history can play a huge roll in your health so you should find time to sit down and have a conversation with your loved ones soon.