The Science of Depression

Depression is a horrible malady that's often hard to pin down. Situational depression is when you feel awful with a reason, like personal loss, trauma, or the world is falling apart, and clinical depression is a mental illness, but these lie on a spectrum and it's hard to determine where the line is. Medical science has some standards for diagnosis, but they can be subjective. There are no biological injuries that point out clinical depression, and treatments vary in effectiveness from person to person. 

Adding to that, the very symptoms of depression make it hard to seek help. Then there's the stigma and expense attached to treatment. But it's very important to recognize the symptoms and seek help if you or someone you know is suffering from depression. (via Geeks Are Sexy)