What Is Depression?
Depression — clinically referred to as Major Depressive Disorder (MDD) or a depressive episode — is a medical condition characterised by a persistent low mood, loss of interest or pleasure in activities, and a range of emotional, cognitive, and physical symptoms that significantly impair a person's ability to function in daily life.
Depression is not a sign of weakness, a character flaw, or something a person can simply "snap out of." It is a recognised medical condition with identifiable neurobiological underpinnings, and it responds to appropriate care. The World Health Organization estimates that more than 280 million people worldwide live with depression, making it one of the most prevalent health conditions globally.
A key diagnostic criterion is duration: symptoms must be present for at least two weeks and represent a change from the person's previous level of functioning. Depression can range from mild to severe, and in its most severe form it can be life-threatening.
Types of Depressive Disorders
Major Depressive Disorder (MDD)
MDD is characterised by one or more major depressive episodes — periods of at least two weeks during which a person experiences a depressed mood or loss of interest in nearly all activities, accompanied by at least four additional symptoms from the diagnostic criteria. Episodes may be single or recurrent.
Persistent Depressive Disorder (Dysthymia)
Persistent depressive disorder involves a chronically depressed mood that lasts for at least two years (one year in children and adolescents). The symptoms are generally less severe than MDD but their chronic nature can be equally debilitating. People with this condition may describe themselves as having "always been this way" or feeling chronically low without a clear reason.
Seasonal Affective Disorder (SAD)
SAD involves depressive episodes that follow a seasonal pattern — typically beginning in autumn or winter and remitting in spring. While less common in South Africa's climate than in northern latitudes, it does occur and is associated with changes in light exposure and circadian rhythm disruption.
Postpartum Depression
Postpartum depression occurs in the weeks or months following childbirth. It is distinct from the "baby blues" — a brief period of mood instability common in the first week after birth — and involves significant depressive symptoms that impair a mother's ability to care for herself and her child. It affects approximately 10–15% of mothers globally, with higher rates in low-resource settings.
Depression with Psychotic Features
In severe cases, depression may be accompanied by psychotic symptoms such as hallucinations or delusions — typically with depressive themes (guilt, worthlessness, illness, or death). This is a serious condition requiring urgent professional assessment.
Symptoms of Depression
The DSM-5 diagnostic criteria for a major depressive episode require five or more of the following symptoms to be present during the same two-week period, with at least one being either depressed mood or loss of interest:
Core Emotional Symptoms
- Persistent depressed mood most of the day, nearly every day (may present as irritability in children and adolescents)
- Markedly diminished interest or pleasure in all, or almost all, activities (anhedonia)
- Feelings of worthlessness or excessive or inappropriate guilt
- Recurrent thoughts of death, recurrent suicidal ideation, or a suicide attempt
Cognitive Symptoms
- Diminished ability to think, concentrate, or make decisions
- Memory difficulties
- Negative thinking patterns — a pervasive sense of hopelessness, helplessness, and worthlessness
- Difficulty imagining a positive future
Physical Symptoms
- Significant weight loss or weight gain, or changes in appetite
- Insomnia or hypersomnia (sleeping too much)
- Psychomotor agitation or retardation (observable slowing of movement and speech, or restlessness)
- Fatigue or loss of energy nearly every day
- Unexplained physical pain — headaches, back pain, or digestive problems
Causes and Risk Factors
Depression arises from a complex interaction of biological, psychological, and social factors. No single cause explains all cases.
Biological Factors
Neurobiological research has identified dysregulation in monoamine neurotransmitter systems — particularly serotonin, norepinephrine, and dopamine — as associated with depression. Structural and functional changes in brain regions including the prefrontal cortex, hippocampus, and amygdala have been observed in people with depression. Genetic factors contribute significantly: individuals with a first-degree relative with depression have a two- to three-fold increased risk. Hormonal factors — including thyroid dysfunction, cortisol dysregulation, and reproductive hormones — also play a role.
Psychological Factors
Certain cognitive styles increase vulnerability to depression, including a tendency toward negative self-evaluation, rumination, and a pessimistic explanatory style. Early adverse experiences — childhood trauma, abuse, neglect, or loss — are among the strongest predictors of depression in adulthood. Perfectionism, low self-esteem, and difficulty regulating emotions are also associated with elevated risk.
Social and Environmental Factors
Significant life events — bereavement, relationship breakdown, job loss, financial crisis, or serious illness — can trigger depressive episodes, particularly in those with underlying vulnerability. Chronic stress, social isolation, lack of social support, and exposure to violence or trauma are important environmental risk factors. Socioeconomic disadvantage — poverty, unemployment, and housing instability — substantially increases risk.
Depression in the South African Context
Prevalence
Depression is highly prevalent in South Africa. The South African Stress and Health (SASH) study found a lifetime prevalence of major depressive disorder of approximately 9.8% and a 12-month prevalence of 4.9%. A separate study estimated that approximately 25.7% of South Africans are probably depressed at any given time when using broader screening criteria. Despite this burden, the vast majority of those affected do not receive any form of care — South Africa's mental health treatment gap is estimated at over 75%.
Structural Drivers
South Africa's extreme levels of inequality, unemployment (officially above 30%), and poverty create chronic psychosocial stress that significantly elevates population-level depression rates. The country's history of apartheid and its ongoing legacy — including spatial inequality, intergenerational trauma, and systemic marginalisation — are recognised contributors to mental health burden.
Trauma Exposure
South Africa's high rates of violent crime, gender-based violence, and community violence mean that a large proportion of the population has experienced significant trauma. Trauma is one of the strongest risk factors for depression, and the cumulative burden of trauma exposure in South Africa contributes substantially to depression rates.
Stigma and Help-Seeking
Mental health stigma remains a significant barrier to care in South Africa. In many communities, depression may be attributed to spiritual causes, personal weakness, or family problems rather than recognised as a medical condition. Men in particular face cultural pressures that discourage acknowledgment of emotional distress and help-seeking. These barriers mean that many people suffer in silence for years before accessing any support.
Access to Care
South Africa spends approximately 5% of its health budget on mental health — well below the WHO recommended minimum — and the public mental health system is severely under-resourced. The ratio of psychiatrists to population is among the lowest in the world. This means that for many South Africans, particularly those in rural areas or relying on public health care, access to specialist mental health services is extremely limited.
Depression and Suicide Risk
Depression is the most significant risk factor for suicide. Approximately 90% of people who die by suicide have a diagnosable mental health condition, most commonly depression. South Africa has a significant suicide burden, with male suicide rates substantially higher than female rates — reflecting both the higher prevalence of untreated depression in men and the use of more lethal means.
Warning signs that require urgent attention include: expressing thoughts of suicide or self-harm; giving away possessions; withdrawing from relationships; saying goodbye; or a sudden calmness after a period of severe depression (which may indicate a decision has been made). If you observe these signs in yourself or someone else, seek help immediately.
When to Seek Professional Help
Consider speaking with a qualified health professional if:
- You have experienced persistent low mood or loss of interest for two weeks or more
- You are having thoughts of self-harm or suicide
- Depression is affecting your work, relationships, or ability to care for yourself
- You are using alcohol or substances to cope with how you feel
- You are experiencing significant changes in sleep, appetite, or energy
- You feel hopeless about the future
A general practitioner (GP) is a good first point of contact. They can assess your symptoms, rule out physical causes (such as thyroid problems or anaemia), and refer you to appropriate specialist care. Under the National Health Act (Section 6), you have the right to be informed about your condition and to participate in decisions about your care.