Depression has an incredibly low rate of correct diagnosis. Common in primary care, affecting 5% to 10% of patients in this setting. Often have a personal or family history of depression; have experienced a recent stress, trauma, or loss; or have comorbid medical illness. Less than half of the cases of depression are correctly identified as such. While new tools and criteria are being developed to help practitioners more accurately define the condition, patients should mention symptoms like low mood, loss of interest, impaired concentration, reduced energy, and thoughts of self-harm or suicide to their health care provider in order to improve the chances of a diagnosis and help with the condition.