 Unlike other health concerns, mental illness is not always easy to see. Depression won't show up on an eye chart, and you won't find PTSD by looking at a thermometer. Sorting out a mental health concern takes professional diagnosis and treatment. Anxiety won't just go away under a bandage. If you or a loved one has a mental health concern, call 1-800-662-HELP for free and confidential information and treatment referral. Learn more at samhsa.gov.