Major Depressive Disorder: Recognizing the Signs and Finding Support

Major depressive disorder (MDD), commonly called depression, is more than temporarily feeling sad or discouraged. It is a medical condition that can affect a person’s emotions, thoughts, physical health, relationships, and ability to manage everyday responsibilities. Depression can affect anyone, and experiencing it is not a sign of weakness or personal failure. Approximately 19.7 million adults suffered from at least one major depressive episode (MDE) in 2025 [1]. With appropriate support and treatment, many people improve significantly.

Common signs and symptoms

Depression does not look the same in everyone. Some people appear visibly sad, while others experience irritability, emotional numbness, unexplained physical symptoms, or withdrawal from activities and relationships.

Common symptoms include:

• Persistent sadness, emptiness, hopelessness, or irritability
• Loss of interest or pleasure in previously enjoyable activities
• Sleeping much more or less than usual
• Changes in appetite or weight
• Low energy or feeling very tired
• Difficulty concentrating
• Feeling worthless, guilty, or like a burden
• Moving or speaking more slowly than usual
• Physical discomfort
• Thoughts about death, self-harm, or suicide

A major depressive episode is a period of at least two weeks of persistent symptoms of depression. Symptoms generally occur most of the day, nearly every day, and cause meaningful distress or difficulty functioning. However, a person does not need to wait two weeks before asking for help—especially if symptoms are severe or safety is a concern. A qualified healthcare professional can determine whether symptoms are caused by depression, another mental health condition, a medical illness, medication, or substance use. More information about symptoms is available from the National Institute of Mental Health [2].

Treatment options

Established evidence-based treatment

Treatment should be individualized according to a person’s symptoms, preferences, medical history, cultural background, and access to care. Common evidence-based options include:

Psychotherapy: Psychotherapy provides a supportive setting to understand emotions, develop healthier coping skills, and make meaningful changes. Cognitive behavioral therapy (CBT) helps people identify and change unhelpful patterns of thinking and behavior, while interpersonal therapy focuses on relationships, grief, conflict, and major life transitions. Other evidence-based approaches include behavioral activation, problem-solving therapy, mindfulness-based cognitive therapy, and short-term psychodynamic therapy. The most appropriate approach depends on the person’s symptoms, needs, preferences, and access to care.

Medication: Antidepressants, including selective serotonin reuptake inhibitors (SSRI) and serotonin-norepinephrine reuptake inhibitors (SNRI), may be recommended. Finding the best medication and dose can take time. Antidepressants should be prescribed and monitored by a qualified professional and should not be stopped suddenly without medical guidance. Antidepressants may cause side effects such as nausea, sleep changes, headaches, sexual difficulties, or weight changes, although effects vary by medication and person and should be discussed with a healthcare professional.

Combined treatment: Using psychotherapy and medication together may be especially helpful for moderate or severe depression or when either treatment alone has not provided adequate relief.

Lifestyle Modifications: Regular sleep, physical activity, balanced nutrition, meaningful social connection, and reduced alcohol or substance use can support recovery. Regular physical activity can meaningfully reduce depressive symptoms and, in some studies, has produced improvements comparable to antidepressant medication [3][4][5]. Exercise and other lifestyle practices may be used alongside professional treatment, but it should not be presented as a universal replacement for psychotherapy or medication, particularly in severe depression. These practices complement professional care rather than replace it.

Treatment for severe or persistent depression: When standard treatments have not worked—or when depression is severe, life-threatening, or accompanied by psychosis—specialists may consider treatments such as electroconvulsive therapy, transcranial magnetic stimulation, or certain rapid-acting medications.

Newer and emerging treatments: Options such as transcranial magnetic stimulation (TMS), supervised esketamine treatment, and newer medications may be considered when standard treatments have not provided enough relief. Electroconvulsive therapy (ECT) remains an important and highly effective treatment for certain severe cases. Researchers are also studying psilocybin-assisted therapy, accelerated brain-stimulation protocols, deep-brain stimulation, and other approaches. Some of these treatments are FDA-approved for specific situations, while others remain experimental and should only be pursued through qualified specialists or regulated clinical trials.

Supplements: Products such as omega-3 fatty acids, vitamin D, folate-based supplements, S-adenosyl-L-methionine (SAMe), and St. John’s wort are sometimes promoted for depression. However, research findings are mixed, and supplements have not been shown to reliably replace psychotherapy or prescribed medication [6]. Small, short-term studies suggest that saffron supplements may reduce symptoms of mild-to-moderate depression, with some trials finding results comparable to antidepressants. However, larger and longer studies are needed [7]. “Natural” does not always mean safe: supplements can cause side effects, vary in quality, and interact with medications. St. John’s wort, for example, interacts with many commonly prescribed drugs and can contribute to serotonin syndrome, which is a medical emergency, when combined with certain antidepressants. Anyone considering a supplement should first discuss it with a healthcare professional, particularly if they take other medications, are pregnant, or have symptoms of bipolar disorder.

Recovery is not always linear. A treatment plan may need to be adjusted over time, and needing a different approach does not mean treatment has failed.

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When to seek professional care

Consider contacting a primary care clinician or mental health professional when symptoms:

• Persist for approximately two weeks or longer
• Interfere with work, school, relationships, sleep, self-care, or daily responsibilities
• Continue to worsen
• Lead to increased alcohol or substance use
• Cause withdrawal from important activities or relationships
• Include feelings of hopelessness, worthlessness, or being a burden

Seek urgent help immediately if you or someone else:

• Is thinking about suicide or self-harm
• Has a suicide plan, intent, or access to lethal means
• Is unable to care for basic needs
• Is experiencing hallucinations, delusions, extreme confusion, or severely unusual behavior
• Presents an immediate danger to themselves or another person

In an immediate life-threatening emergency, call 911 or go to the nearest emergency department. In the United States, call or text 988, or use the online chat through the 988 Suicide & Crisis Lifeline. The service provides free, confidential support 24 hours a day, every day.

When concerned about someone else, ask directly and calmly whether they are thinking about suicide. Asking does not place the idea in someone’s mind. Listen without judgment, remain with the person when it is safe to do so, reduce access to lethal means, and connect them with crisis or professional support.