Depression

Low mood, loss of interest and fatigue lasting two weeks or more.

Overview

Depression is diagnosed by pattern and duration rather than a single test. Treatment usually combines therapy and, when appropriate, medication, with follow-up in the first weeks to check response and side effects.

Common symptoms

  • Persistent sadness or emptiness
  • Loss of interest in usual activities
  • Sleep or appetite changes
  • Low energy
  • Trouble concentrating

When to seek care

  • Symptoms lasting more than two weeks
  • Difficulty keeping up with work or caregiving
  • Any thoughts of suicide — call or text 988 immediately

Specialists who treat depression

Providers accepting patients

See all

Frequently asked questions

How long until treatment works?
Therapy often shows benefit within 4–8 weeks; antidepressants are usually reassessed at 4–6 weeks.

This page is general health education, not medical advice, and does not create a patient relationship. Talk with a licensed clinician about your situation. In an emergency, call 911.