Depression: symptoms, treatment, and when to get help
Last updated September 3, 2026.
Depression is more than sadness. It is a persistent low mood or loss of interest and pleasure in things you used to enjoy, lasting most of the day, nearly every day, for at least two weeks, usually with changes in sleep, appetite, energy, concentration, or self-worth. It is common, it is not a character flaw, and it is one of the most treatable conditions in medicine: most people improve substantially with therapy, medication, or both.
What does depression actually look like?
- Low mood or emptiness most of the day, most days
- Loss of interest or pleasure in things that used to matter (doctors call this anhedonia)
- Sleep changes: insomnia or sleeping far more than usual
- Appetite or weight changes, either direction
- Exhaustion, moving or speaking slowly, or feeling agitated and restless
- Guilt, worthlessness, trouble concentrating, or in severe cases thoughts of death or self-harm
You do not need every symptom. The two core ones are persistent low mood and loss of interest; several of the rest, most days, for two weeks or more, is the clinical picture. Depression also hides in physical complaints: unexplained aches, digestive trouble, and fatigue are common presentations.
What actually works as treatment?
For mild depression, the first-line recommendation is structured psychological therapy, especially CBT, plus the unglamorous basics that genuinely shift outcomes: regular exercise (comparable to medication in some trials for mild cases), fixed sleep and wake times, and staying connected to people. For moderate to severe depression, the evidence supports therapy, antidepressant medication, or both together, and combination treatment works best for many people. Antidepressants take two to six weeks to show effect and the first one tried helps roughly half of people; switching or adjusting is normal, not failure. Seasonal patterns sometimes respond to light therapy. If you have had two or more episodes, staying on treatment longer prevents relapse.
What should I do if things feel unsafe?
If you are having thoughts of hurting yourself or ending your life, treat that as urgent the same way you would treat chest pain. In the US, call or text 988 (Suicide and Crisis Lifeline), free, 24/7. Outside the US, contact your local crisis line or emergency services. If someone you know mentions these thoughts, take it seriously and help them reach one of those options. Depression that includes thoughts of self-harm is treatable, and crisis lines handle exactly this every day.
When should I get help, and what kind?
Get help when symptoms have lasted two weeks or more, when they are interfering with work, relationships, or basic functioning, or any time self-harm thoughts appear. Start wherever is easiest: a primary care clinician, a therapist, or a text-based consult that can sort severity and route you. Some physical conditions mimic depression (thyroid problems, anemia, vitamin D or B12 deficiency, sleep apnea), so a basic workup is often part of a first evaluation. Pymander's escalation routing is built and tested specifically for crisis detection; see the safety architecture working paper.
What a Pymander AI doctor consult looks like
Illustrative example, not a real member's messages.
Common questions
How do I know if I have depression or am just sad?
Sadness has a cause, comes in waves, and lifts. Depression is a low mood or loss of interest and pleasure that persists most of the day, nearly every day, for at least two weeks, and usually drags sleep, appetite, energy, concentration, or self-worth with it. A useful test: when something good happens, sadness lets you feel it briefly; depression often does not. Neither diagnosis nor severity can be settled by a single bad week, which is why clinicians ask about duration and functioning rather than any one feeling.
What are the symptoms of depression?
The two core symptoms are persistent low mood and loss of interest or pleasure in things you used to enjoy. Around those: sleeping too little or too much, appetite or weight change in either direction, fatigue, moving or thinking slowly, restlessness, guilt or worthlessness, trouble concentrating, and in severe cases thoughts of death or self-harm. Several of these, most days, for two weeks or more, is the clinical picture. Depression also commonly shows up as physical complaints like unexplained aches, digestive trouble, and exhaustion.
What actually treats depression?
For mild depression, first-line treatment is structured psychological therapy, especially CBT, plus exercise, regular sleep, and social connection, which have real evidence behind them. For moderate to severe depression, therapy, antidepressants, or both together are supported, with combination treatment often working best. Antidepressants take two to six weeks to work and the first one tried helps about half of people; switching is routine, not failure. Treatment works: most people improve substantially, and people with repeated episodes stay well longer by continuing treatment.
Can depression be something physical?
Yes, and this is why a first evaluation often includes basic blood work. Underactive thyroid, anemia, vitamin D or B12 deficiency, sleep apnea, and some medications can all produce a depression-like picture. Heavy alcohol or cannabis use can drive low mood directly. Treating the physical cause, when one exists, changes the whole plan, so a thorough workup asks about sleep, substances, medications, and runs a small set of labs rather than assuming the cause is psychological.
What do I do if someone I love is depressed?
Stay connected and keep it ordinary: regular low-pressure contact beats one big talk. Listen without trying to fix, avoid 'snap out of it' framing, and help with concrete steps like booking an appointment or going with them. If they mention thoughts of self-harm or suicide, take it seriously every time: in the US call or text 988 together, outside the US contact the local crisis line, and stay with them until help is connected. Asking directly about suicidal thoughts does not plant the idea; it opens the door to help.
Can I talk to a doctor about depression over text?
Yes, and many people find it easier to type these things than to say them out loud. Depression assessment is almost entirely conversation: duration, symptoms, functioning, safety, medical mimics, and past history all translate well to text. A clinician or an AI doctor can sort severity, suggest first steps, arrange therapy or medication routes, and set check-ins. The situation that should never stay text-only is active thoughts of self-harm; that goes straight to 988 in the US or your local crisis line, which exist exactly for this.
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