When we do our family tree, we focus on births, deaths, marriages, and other significant events. One very important piece of information is generally missing. As you do your genealogical research, take the time to gather health history as well. This is helpful information for you, your family and your doctor, especially for diseases that are hereditary.
There are several options to gather health information. For deceased persons in my tree, I generally add cause of death as a fact to my tree. You can also upload documents and attach to your tree. Be mindful what information you share especially if you make your tree accessible to the public.
The March of Dimes has a very comprehensive family-health-history-form that could be completed and attached as a fact to your family tree. This form is pretty involved.
Other useful sites include:
Tracing Your Health History at Genealogy.com
Know Your Family Health History at FamilySearch
Ancestry.com – Creating a Health History (requires Family Tree Maker software)
Between The Dashes