Depression

What it is

Everyone feels sad sometimes. Depression is different. It is a medical condition in which low mood, or a loss of interest in things you used to enjoy, lasts for at least two weeks and starts to interfere with daily life: work, school, family, faith, friendships.

Depression changes more than mood. It affects sleep, appetite, energy, concentration and how a person sees themselves and the future. It is one of the most common health conditions in the world, and one of the most treatable.

What it can feel like

People describe depression in many ways: a low mood that does not lift, feeling empty or numb, crying easily or being unable to cry at all. Food loses its taste. Sleep becomes broken, or all a person wants to do is sleep. Thinking slows down, and small decisions feel very hard. Many people feel worthless or guilty about things that are not their fault.

In many African communities, depression often appears as physical symptoms first: constant headaches, fatigue, chest tightness, stomach problems or general body pain that tests cannot explain. This is a recognised presentation of depression, not imagination. Some people also have thoughts that life is not worth living. These thoughts are a symptom of the illness, and they are a signal to get help urgently.

The different types of depression

Depression is not one single thing. Doctors recognise several types, which share the same core of low mood but differ in pattern, cause, or timing. Knowing the type helps guide the right treatment.

• Major depressive disorder is the most common type and the main focus of this guide: episodes of low mood and loss of interest that last at least two weeks.
• Persistent depression is a lower-grade low mood that lasts much longer, often two years or more.
• Premenstrual dysphoric disorder (PMDD) brings severe mood symptoms in the week or two before a period.
• Disruptive mood dysregulation disorder (DMDD) describes ongoing severe irritability and anger in children.
• Depression caused by substances or medicines is low mood brought on by alcohol, other drugs, or certain medications.
• Depression from a medical condition is low mood that comes directly from a physical illness, such as thyroid disease.

Depression can also follow childbirth, known as perinatal or postnatal depression, and some people have a seasonal pattern, with low mood in certain months of the year. Low mood is also part of bipolar disorder, where it alternates with periods of unusually high energy. If your low periods change into times of racing thoughts and very high energy, mention this to a clinician, because the treatment is different.

How common is it

The World Health Organization estimates that about 5% of adults live with depression, around 280 million people globally. It occurs in every country, every income group and every culture. Women are diagnosed roughly twice as often as men, though men are less likely to seek help and more likely to go undiagnosed.

In low- and middle-income countries, including most of Africa, the great majority of people with depression, more than three in four, never receive any treatment. Closing that gap is part of why The Mind Project exists.

What causes it

There is no single cause. Depression usually develops from a combination of factors: family history (genetics account for roughly a third of the risk), stressful life events such as bereavement, job loss or relationship breakdown, chronic illness, childhood adversity, poverty and unemployment, and changes in brain systems that regulate mood, sleep and stress.

You may have heard depression described as a simple “chemical imbalance.” Scientists now consider that explanation too simple. Brain chemistry is involved, but depression is best understood as a condition of the whole person: biology, life circumstances and psychology together. That is also why several different kinds of treatment work.

How it is diagnosed

There is no blood test for depression. A trained clinician (a doctor, psychiatrist, clinical psychologist or trained nurse) makes the diagnosis through a careful conversation about symptoms, how long they have lasted (at least two weeks, most of the day, nearly every day) and how they affect daily life.

A good assessment also rules out medical look-alikes such as thyroid problems, anaemia or medication side effects, which is why a doctor may order blood tests. Short questionnaires like the PHQ-9 are useful for screening, but a questionnaire alone is never a diagnosis.

How it is treated

Depression is among the most treatable mental health conditions. For mild to moderate depression, talking therapies are the recommended first step. Cognitive behavioural therapy (CBT), interpersonal therapy (IPT), behavioural activation and problem-solving therapy all have strong evidence behind them.

For moderate to severe depression, antidepressant medicines are effective. The largest study ever done on this, comparing 21 antidepressants across more than 500 trials, found that all of them work better than placebo. The most commonly used are SSRIs (see our medications guide). Antidepressants usually take two to six weeks to show their effect, and they should never be stopped suddenly without medical advice.

For severe depression, the combination of therapy and medication works better than either alone. Regular physical activity, social connection and routines around sleep all support recovery. Faith and community can be genuine sources of strength alongside, not instead of, treatment.

Depression in the African context

Some of the world's most important evidence that depression treatment works in African settings comes from Africa itself. A landmark trial in rural Uganda showed that group interpersonal therapy, delivered by trained local facilitators, substantially reduced depression. In Zimbabwe, the Friendship Bench programme trained community health workers, grandmothers, to deliver problem-solving therapy on simple wooden benches outside clinics, with results published in one of the world's leading medical journals.

The lesson is hopeful and practical: effective care does not always require a psychiatrist's office. It requires trained people, evidence-based methods, and a community willing to talk.

Managing depression day to day

Treatment works best when it is supported by small daily steps. These do not replace therapy or medication, but they help recovery and give back a sense of some control.

• Keep a regular routine for sleeping, waking, and eating, even when motivation is low.
• Do one small, manageable activity each day, even if you do not feel like it. Acting first and letting the mood follow is a method therapists call behavioural activation.
• Move your body in small ways. A short daily walk has real evidence behind it for improving mood.
• Stay connected to people you trust, even briefly, rather than withdrawing.
• Limit alcohol and other drugs, which deepen low mood over time.
• Set small, realistic goals, and notice what you manage rather than what you do not.

Our self-help exercises offer simple, structured tools you can try alongside professional care.

Helping someone with depression

If someone you care about is depressed, your support can make a real difference. You do not need the right words or any training.

• Take it seriously. Depression is an illness, not a mood a person can simply choose to leave.
• Listen without judgement, and avoid telling them to cheer up, be grateful, or pray it away, even with good intentions.
• Encourage them to seek professional help, and offer practical support, such as helping them find a clinician or going with them. Our find a therapist page can help.
• Offer concrete help with everyday tasks, rather than a general "let me know if you need anything."
• Stay in touch. A short message or visit matters more than you may think.
• Take any mention of suicide or self-harm seriously, and help them reach urgent support straight away.

Caring for someone is easier with support of your own. Peer and family support groups bring together people facing similar situations.