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Learn causes, symptoms, and treatment options. Understand major depressive disorder and how care can help.
maverick
Clinical Editorial Team
Learn causes, symptoms, and treatment options. Understand major depressive disorder and how care can help.
Many people ask, “Is depression a disease?” The short answer is yes. Depression is a real medical condition. It is not a weakness. It is not just feeling sad. It is a serious mental disorder that affects your mood, mind, and body.
If you are struggling, you can learn more about professional depression treatment in San Diego by visiting our main page here.
Getting help from a trained mental health professional can change your life.
In this guide, we will explain what depression is, how it affects the brain, and how treatment works.
Many people wonder, “What is the meaning of depression?”
Depression is a mood disorder that causes long-lasting sadness, low energy, and loss of interest in things you once enjoyed. It can affect your:
It is listed in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), which is published by the American Psychiatric Association. This manual helps doctors diagnose mental health conditions.
It is normal to feel sad after loss, stress, or grief. But sadness usually passes. Depression does not.
When people ask, “Is depression a disease?” doctors answer yes because:
Depression is a medical disease of the brain and body. It is part of the field of psychology, psychiatry, and neurology.
You may also ask, “What is major depressive disorder?” or “What is major depression?”
Major depressive disorder (MDD) is the most common form of depression. It involves at least one major depressive episode lasting two weeks or longer.
Symptoms may include:
When symptoms are intense, people may call it “what is severe depression?”
Some people ask, “What is chronic depression?”
Chronic depression is also known as dysthymia or persistent depressive disorder. It lasts for two years or longer. Symptoms may be less severe than major depression but last much longer.
The biology of depression involves brain chemicals called neurotransmitters.
Two important chemicals are:
These chemicals help control mood, sleep, and affect. Low levels can increase depression risk.
Depression affects the nervous system and how the brain processes emotion and cognition. It can slow thinking and affect memory.
Research shows that genetics play a role. If a close family member has depression, bipolar disorder, or schizophrenia, your risk may be higher.
Doctors use the biopsychosocial model to understand depression. This model looks at:
Stress, pregnancy, childbirth, and life events like grief can increase risk.
Some people confuse depression with bipolar disorder.
You may ask:
Bipolar disorder is a mood disorder that includes both depression and periods of high energy called mania or hypomania.
Bipolar I includes full mania. Bipolar II includes hypomania and depression.
This is different from major depressive disorder, which does not include mania.
Depression can be linked with:
These conditions all involve emotional dysregulation and mood changes.
Depression often happens with other conditions. This is called comorbidity.
It may occur with:
Depression can also increase suicide risk, especially when combined with substance abuse.
If someone is in crisis, they should call the Suicide and Crisis Lifeline right away.
A health professional or mental health professional will perform:
Psychiatry focuses on diagnosis and medicine. Psychology focuses more on therapy and behavior change.
Doctors rule out medical causes such as thyroid problems or diabetes.
The good news is that depression is treatable.
Therapy helps people understand thoughts, behavior patterns, and coping skills. It is a key part of the management of depression.
Doctors may prescribe medication such as:
These medications are approved by the Food and Drug Administration (FDA).
An antidepressant can improve serotonin levels. Some people may also receive a benzodiazepine for short-term anxiety symptoms.
Every medicine can have a side effect or adverse effect, such as weight gain, sleep changes, or nausea. A placebo may be used in a clinical trial to test new treatments.
For severe or refractory depression, doctors may recommend electroconvulsive therapy (ECT). This is used when other treatments do not work.
Research is exploring new treatments like psilocybin in controlled medical settings. These are still being studied in clinical trials.
Some people ask, “What is refractory depression?”
Refractory depression means the condition does not improve after trying several treatments. In these cases, doctors adjust medication, therapy, or try advanced options like ECT.
Depression affects the whole body.
It can cause:
It can even raise risk for cardiovascular disease.
In the past, people misunderstood depression. Even historical figures like Samuel Johnson wrote about deep sadness without knowing it was a medical condition.
Today, research clearly shows depression is a disease of the brain and mind. It is not caused by laziness or weak character.
The long-term management of depression may include:
Relapse can happen, but with proper treatment and coping skills, recovery is possible.
You should talk to a mental health professional if you notice:
Early treatment lowers risk and improves outcomes.
At Aria Mental Health, our team of trained professionals in psychology and psychiatry provide evidence-based care for depression and related mood disorders.
Depression is a medical disease, not a choice. It involves changes in brain chemistry, genetics, and the nervous system.
Major depressive disorder is a serious mood disorder with long-lasting sadness, low energy, and loss of interest that lasts at least two weeks.
Yes. Depression can cause sleep problems, appetite changes, weight gain, fatigue, and even increase risk of cardiovascular disease.
Treatment may include therapy, antidepressant medication like a selective serotonin reuptake inhibitor, and in severe cases, electroconvulsive therapy.
Yes. Depression often occurs with anxiety disorder, substance abuse, bipolar disorder, ADHD, and other mental disorders.
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