Depression is one of the most common mental health illnesses in the United States, affecting about 26 percent of adults. Depression is technically a mental disorder, but it also affects your physical health and well-being. Learn more about some of the most common symptoms of depression, as well as how depression can affect your entire body, especially if left untreated.Untreated, depression raises the risk of dying after a heart attack. Heart disease is also a trigger for depression. The Cleveland Clinic estimates that about 15 percent of people with heart disease also develop major depression.Depression and stress may have a negative impact on the immune system, making you more vulnerable to infections and diseases. One review looked at studies and found that there seemed to be a relationship between inflammation and depression, although the exact connection is unclear. Inflammation is linked to many illnesses, such as stress. Some anti-inflammatory agents have shown to benefit some people with depression.

Suicide prevention

If you think someone is at immediate risk of self-harm or hurting another person:

  • Call 911 or your local emergency number.
  • Stay with the person until help arrives.
  • Remove any guns, knives, medications, or other things that may cause harm.
  • Listen, but don’t judge, argue, threaten, or yell.

If you think someone is considering suicide, get help from a crisis or suicide prevention hotline. Try the National Suicide Prevention Lifeline at 800-273-8255.

Sources: National Suicide Prevention Lifeline – Substance Abuse and Mental Health Services Administration