Meet Sammy. On the surface, Sammy seems to have life under control—a steady job, a few close friends, and a routine that looks perfectly normal. But behind that calm exterior, Sammy is living with moderate recurrent depression. This isn’t merely feeling sad for a few days; it’s a cycle of episodes that recur repeatedly, each lasting weeks and making everyday tasks feel overwhelming.

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What Is Depression?

Depression is more than sadness. According to the DSM-5-TR, a diagnosis of Major Depressive Disorder requires at least five symptoms for two or more weeks, causing significant distress or impairment. Common symptoms include (American Psychiatric Association [APA], 2022):

• Feeling sad, irritable, empty, and/or hopeless
• Losing interest or pleasure in activities you once enjoyed
• Significant changes in appetite (overeating or undereating) and/or weight (notable loss or gain unrelated to dieting)
• Sleeping too little or too much
• Decreased energy or increased tiredness or fatigue
• Noticeable changes in physical activity—either restlessness (e.g., pacing, handwringing) or slowed movements and speech observable by others
• Feeling worthless or excessively guilty
• Difficulty thinking, concentrating, forgetfulness, and/or trouble making even minor decisions
• Thoughts of death, suicidal ideation, or suicide attempts

Severity Specifiers: How Intense Is It?

Depression isn’t one-size-fits-all. DSM-5-TR uses severity specifiers to describe how much symptoms interfere with life (APA, 2022):

• Mild: Few symptoms beyond the minimum; minor impact on daily life
• Moderate: Symptoms and impairment are between mild and severe (Sammy’s case)
• Severe: Many symptoms beyond the minimum; major disruption in functioning, possible suicidal thoughts

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Course Specifiers: How Often Does It Happen?

Depression can be a single episode or a recurring pattern:

• Single Episode: One major depressive episode
• Recurrent Episode: Two or more episodes, separated by at least 2 months without symptoms
• In Partial Remission: Some symptoms remain, but not full criteria
• In Full Remission: No significant symptoms for 2+ months

Sammy’s story? Moderate recurrent depression—meaning multiple episodes over time, with periods of relief in between.

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How It Shows Up in Everyday Life

Depression often hides behind a smile. Someone may present well, appearing happy and managing well in public, but their private life may be very different. Someone may function well at work or in social settings, but this is often a facade. For Sammy, it looks like:

• Struggling to get out of bed
• Avoiding social interactions
• Feeling “numb” or disconnected
• Losing interest in hobbies that once brought joy

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What Causes Depression?

Depression is a multifactorial condition that rarely stems from a single cause. Instead, it often results from an interplay of biological, psychological, and environmental factors, consistent with the biopsychosocial model.

Biological Factors

• Genetics: A family history of depression increases vulnerability. Twin and family studies suggest heritability plays a significant role in risk (Kessler & Bromet, 2013).
• Brain Chemistry: Dysregulation of neurotransmitters such as serotonin, dopamine, and norepinephrine can impair mood regulation (Hu et al., 2021).
• Medical Conditions: Chronic illnesses, hormonal changes, and certain medications may contribute to depressive symptoms.

Psychological Factors

• Trauma and Early Life Stress: Childhood adversity, abuse, or major loss can predispose individuals to depression later in life.
• Relational Trauma: Harmful or neglectful relationships—such as emotional abuse, betrayal, or chronic invalidation—can deeply impact self-worth and emotional regulation, increasing vulnerability to depression.
• Negative Thinking Patterns: Persistent self-criticism, hopelessness, and distorted thinking can fuel depressive episodes.
• Personality Traits: High neuroticism and low resilience increase susceptibility. and low resilience increases susceptibility.

Environmental Factors

• Stressful Life Events: Job loss, financial strain, or relationship breakdowns often act as triggers.
• Social Isolation: Lack of supportive relationships can exacerbate feelings of loneliness and despair.
• Major Life Changes: Relocation, divorce, or caregiving responsibilities can create overwhelming stress.

Research underscores that these factors rarely act in isolation; rather, they interact dynamically, influencing onset, severity, and recurrence of depression (Kessler & Bromet, 2013;Hu et al., 2021; Aguwa, 2020).

Closing Thought

Depression is real—and treatable. Understanding it is the first step toward healing.
Next up: In our next post, we’ll explore practical treatment options and coping strategies to help manage depression and reclaim your life.

Ready to learn how to manage depression? Read Depression Treatment and Coping Strategies: Starting Small for Big Impact (coming out Tuesday, February 3 at 10:00am

If this series resonates with you, please like, share, or comment to help others discover it. Your engagement helps spread these important insights—and might just inspire someone to rewrite their own script.

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References

Aguwa, L. (2020). Depression: The biological and environmental factors contributing to depression—A systematic review. University of Liverpool. Retrieved from https://www.academia.edu/80679824

American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.). https://doi.org/10.1176/appi.books.9780890425787 

Hu, Y., Yiu, V., & Clark, R. (2021). Etiology of depression: Biological and environmental factors in the development of depression. Journal of Student Research. https://doi.org/10.47611/jsrhs.v10i4.2017

Kessler, R. C., & Bromet, E. J. (2013). The epidemiology of depression across cultures. Annual Review of Public Health, 34, 119–138. https://doi.org/10.1146/annurev-publhealth-031912-114409