Depression is an illness that can affect anyone at anytime. We tend to think first of the drastic changes in the way a person thinks, or carries themselves.  You will notice a shift in there moods, or perhaps they may self isolate.  It is equally important to note that although depression is a mental illness, it  also has affects on the body physically.  Depression may also affect the brain and central nervous system, the heart and blood vessels, the immune system, and your bones. If your think your depressed please seek medical help, which could in the long run may save your life.