Depressive Disorders
Major Depressive Disorder
Major Depressive Disorder, often just called depression or clinical depression, is a persistent low mood or loss of interest that lasts at least two weeks and changes how you sleep, eat, think, and function. It can feel like the color drained out of life. It's also one of the most treatable conditions in all of medicine.
Medically reviewed by Shariq Refai, MD, MBA, FAPA, board certified psychiatrist · Published June 7, 2026 · Last reviewed June 8, 2026 · Editorial policy
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Major depression, explained by a psychiatrist
Dr. Refai walks through what major depression is, and what actually treats it.
Understanding it
What is major depressive disorder?
It's normal to feel sad or to hit rough patches. Major depressive disorder is different. It's a persistent low mood or loss of interest that lasts most of the day, nearly every day, for two weeks or longer, and it interferes with work, relationships, sleep, and even physical health.
Depression is a medical condition tied to changes in brain chemistry, energy, motivation, and thinking. It isn't a character flaw, and it isn't something you can simply talk yourself out of. About one in six people will experience depression at some point in their lives, and the great majority get meaningfully better with the right care.
Depression also comes in degrees. Mild depression can feel like a cloud that dims everyday joy. Moderate depression makes it harder to function at work or at home. Severe depression can make basic tasks, like getting out of bed, feel impossible. Knowing where you fall helps shape the plan.
How it shows up
Common symptoms of major depression
Depression is more than a bad week. People with MDD usually notice several of these, most of the day, nearly every day, for at least two weeks:
Depression doesn't always look like crying
Depression wears different masks. For some people it's tearful sadness. For others it's numbness, irritability, or a flat, going through the motions feeling. In many people it shows up first in the body, as fatigue, headaches, or sleep changes, which is part of why it gets missed for so long.
If several of these have lasted more than two weeks, that's a good reason to talk with a clinician, not a sign that you're overreacting.
- Persistent low mood, emptiness, or hopelessness
- Loss of interest or pleasure in things you used to enjoy
- Sleep changes, either insomnia or sleeping too much
- Low energy and fatigue that rest doesn't fix
- Appetite or weight changes not related to dieting
- Trouble concentrating, remembering, or making decisions
- Feelings of worthlessness or heavy, out of proportion guilt
- Restlessness or a slowed down feeling others can notice
- Thoughts of death, or that life isn't worth living
Not one thing
The different types of depression
Depression is an umbrella. Naming the specific pattern, with help from a clinician, is the first step toward the right treatment. Common forms include:
Why the distinction matters
These types share symptoms but respond to different plans. Treating bipolar depression as ordinary depression, for example, can backfire. That's why an accurate diagnosis comes before any prescription.
- Major depressive disorder (MDD): intense, persistent low mood or loss of interest lasting two weeks or more
- Persistent depressive disorder (dysthymia): a lower grade depression that runs for two years or longer
- Bipolar depression: depressive episodes that belong to bipolar disorder and alternate with highs, which is why we always screen
- Seasonal affective disorder: depression that follows the seasons, usually deepening in the darker months
- Postpartum and perinatal depression: depression during pregnancy or after childbirth
- Premenstrual dysphoric disorder (PMDD): severe depression and irritability in the days before a period
Why it happens
What causes depression?
Depression rarely has a single cause. It usually grows out of several factors working together, which is why understanding it as a real health condition, not a personal failing, is part of getting better.
- Brain chemistry: how neurotransmitters like serotonin, norepinephrine, and dopamine regulate mood
- Genetics: depression tends to run in families
- Life experience: trauma, loss, chronic stress, or major transitions
- Medical contributors: thyroid problems, vitamin deficiency, chronic illness, or sleep disorders
- Substances and certain medications
- Seasonal changes in daylight for some people
Getting it right
How major depression is diagnosed
Diagnosis usually starts with a brief screening, often a questionnaire called the PHQ-9, which helps gauge how severe symptoms are and, used over time, tracks your progress.
If the screening points toward depression, the next step is a full psychiatric evaluation, a deeper conversation about your symptoms, history, and daily life. We compare what we find against the criteria in the DSM-5-TR, the manual clinicians use, and we screen for bipolar disorder and rule out medical causes. Many people feel real relief at this stage. The right diagnosis is what opens the door to the right treatment.
What helps
How we treat major depression
Major depression is highly treatable. The American Psychiatric Association estimates that 80 to 90 percent of people respond well once they get care. A good plan is matched to you, not pulled off a shelf.
Psychiatry, therapy, or both?
Psychiatry and therapy are both powerful, and they often work best together. Psychiatry focuses on diagnosis and medication when it's needed. Therapy helps you process experiences and build coping skills. You don't have to choose one over the other, and we help you find the mix that fits.
For more severe or treatment resistant depression, there are additional options worth discussing, and we'll point you toward them honestly.
- Comprehensive evaluation that screens for bipolar disorder and rules out medical causes
- Medication when it helps: non controlled antidepressants such as SSRIs, SNRIs, or bupropion, chosen for your symptoms and side effect profile. For adults under 25, these medicines carry an FDA warning about a short term rise in suicidal thoughts early on, which is why we keep follow up close in the first weeks
- Therapy coordination: evidence based approaches like CBT or behavioral activation, which pair well with medication or stand on their own
- Lifestyle support: sleep, movement, and routine that reinforce recovery
- Ongoing follow up aimed at full remission, not just slightly less bad
Care at shrinkMD
What depression care looks like here
Your first visit is a full psychiatric evaluation by secure video, as clinician availability allows. You'll meet a certified clinician, a psychiatrist or a psychiatric nurse practitioner, who takes time to understand your story before building a plan with you.
If medication is part of the plan, remember that antidepressants typically take two to six weeks to show their full effect. We start thoughtfully, watch for side effects, and stay in close contact. The goal isn't just feeling less bad. It's getting back to feeling like yourself.
Care is virtual, so you can be seen from home, which matters when depression makes travel and logistics feel heavy. You stay with a clinician who knows your history over time, not a different face at every visit.
“Depression lies to people. It tells them this is just who they are now. My job is to show them that's the illness talking, and that getting your life back is not only possible, it's the expected outcome of good care.”
Shariq Refai, MD, MBA, Founder of shrinkMD
Myths and facts
Clearing up common depression myths
Myth: You should be able to snap out of it.
Fact: Depression is a medical illness, not a willpower problem. Telling someone to snap out of it is like telling diabetes to resolve itself. Treatment is what helps.
Myth: Antidepressants change your personality.
Fact: Well matched medication lifts the depression so your own personality can return. We adjust carefully to find the right fit with minimal side effects.
Myth: If therapy didn't work before, nothing will.
Fact: Depression is treatable, and the right combination matters. A fresh evaluation, the right medication, and the right therapy often succeed where a single approach didn't.
Keep exploring
Related care and next steps
Related conditions
Frequently asked questions
Good questions, clear answers
What is the best treatment for depression?
The best plan depends on your symptoms and circumstances. For many people it combines a non controlled antidepressant with therapy, plus lifestyle support. The point of the evaluation is to match the plan to you rather than guess.
How is major depression diagnosed?
Through a brief screening like the PHQ-9 followed by a full psychiatric evaluation that reviews your mood, sleep, energy, appetite, focus, and safety, screens for bipolar disorder, and rules out medical causes.
How long do antidepressants take to work?
Most take two to six weeks to show a real effect. We start thoughtfully and stay in close contact so we can adjust early if needed.
Do you prescribe controlled medication for depression?
No. We use non controlled antidepressants such as SSRIs, SNRIs, or bupropion, paired with therapy when helpful.
Can depression be treated without medication?
Yes for many people, especially milder depression, with therapy and lifestyle changes. Moderate to severe depression often does best with medication plus therapy. The evaluation guides the choice.
Can I live a normal life with depression?
Absolutely. Depression can be recurring, but with the right support most people manage it well and feel like themselves again. Reaching out is the step that makes that possible.
Is online care effective for depression?
Yes. Research shows telepsychiatry matches in person care for depression, and it removes the travel and effort that depression makes harder.
What if I'm having thoughts of suicide?
If you're in danger, call or text 988 or call 911 now. shrinkMD provides scheduled outpatient care and is not a crisis service, but we take safety seriously and build it into every plan.
Sources
Sources and further reading
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