Depression

Depression is one of the most common reasons people look for a therapist, and also one of the most treatable. It is a genuine health condition: not a weakness, and not something you should be able to talk yourself out of.

Depression is common everywhere. Globally, an estimated 5.7% of adults¹ live with it. There is effective treatment for mild, moderate and severe depression. Most people who get the right help do get better.

Is this depression, or ordinary low mood?

Most people feel low after a loss, a setback, or a hard week, and the feeling eases as life settles. Depression is different from regular mood changes and feelings about everyday life.¹ It stays for weeks, and it changes how a person sees themselves, other people, and the future.

A clinician looks for a cluster of changes. They must be present most of the day, nearly every day, for at least two weeks, and they must also get in the way of ordinary life.

The DSM-5-TR is the diagnostic manual used across much of the world. A diagnosis of major depression needs five or more of these symptoms present together,³ and at least one must be low mood or a loss of interest and pleasure. That loss of interest is called anhedonia: enjoyment fades in things that used to matter.

The symptoms a clinician weighs up include low mood or a loss of interest, alongside changes in sleep, appetite, energy and concentration, and feelings of guilt or worthlessness.³ One flat fortnight is not a diagnosis; a pattern that lasts, and that gets in the way of daily life, is worth taking to a professional.

What depression can look like

Depression is felt in the body as much as in the mind, and it looks different from one person to the next. It can show up as a heavy, flat low, as tearfulness, or as a numb sense that nothing much matters. Some people feel more irritable or on edge than sad, which is easy to miss.

Depression also changes how a person thinks: concentration and memory can slip. Decisions feel too big, and the way you talk to yourself turns harsh and critical. Thoughts of guilt, worthlessness or hopelessness are common. For some people, thoughts of death or suicide come too.

Sleep and appetite often change in either direction, energy drops, and everyday tasks take far more effort than they used to.

Aches, restlessness and a general heaviness are part of the same condition. So much of this is physical that many people first see their GP about tiredness or sleep, before depression is named.

The main forms of depression

The forms below all involve low mood and lost interest, but they differ in how long they last, and in what sets them off.

• Major depressive disorder: one or more distinct episodes of depression, lasting at least two weeks and deep enough to disrupt daily life.
• Persistent depressive disorder (dysthymia): a milder depression that runs on for a long time, often years. Because it lasts, it can start to feel like part of who you are rather than an illness.
• Seasonal pattern: depression that returns at the same time each year, most often in the darker winter months, and eases as the season changes.
• Perinatal and postnatal depression: depression during pregnancy or in the year after birth. It is common, it is treatable, and it is not a sign of being a bad parent.
• Depression with psychotic features: severe depression alongside a loss of contact with reality, such as fixed false beliefs. This needs prompt specialist care.

Why depression happens

Depression is often described as a chemical imbalance in the brain. The fuller picture is more complicated: depression comes from the interaction between biology, psychology and life circumstances, and it is not a single faulty chemical that a pill corrects.

Biology plays a part: a family history of depression, physical illness, hormonal changes and long-running stress all raise the risk. People who have lived through abuse, severe losses or other stressful events¹ are at higher risk, and isolation, money worries and relationship strain can all add to it.

Psychology matters too, in how a person learns to understand themselves and the world. None of this makes depression a choice or a character flaw. It also means there are several points where support can make a difference, which is why treatment can work through more than one route.

Depression across different lives

More women are affected by depression than men,¹ though men may be less likely to name it. They are more likely to show it as anger, withdrawal or drinking.

In older adults it is sometimes mistaken for ageing or physical illness. In children and teenagers it can look like irritability, falling grades or withdrawal from friends, rather than obvious sadness.

Depression often occurs alongside other conditions: anxiety, chronic pain, or a long-term physical illness. Each one makes the other harder to manage. Treating the depression at the same time as the rest usually serves a person best, and waiting for one to clear first tends not to work.

What helps

There is usually more than one reasonable route. A useful principle, and the one used in guidelines such as the UK's NICE, is to consider the least intrusive and least resource intensive treatment first.⁴ Build up from there if it is needed.

For milder depression, talking therapies and structured self-help are often the first step. Cognitive behavioural therapy, behavioural activation and interpersonal therapy all have a strong record.

Cognitive behavioural therapy works on the links between thoughts, behaviour and mood. Behavioural activation rebuilds ordinary activity before the motivation returns. Interpersonal therapy works on relationships and life changes.

Psychodynamic and other approaches help many people too. The aim is to understand what keeps the depression going, and to help a person take part in life again.

For more severe or long-standing depression, therapy and medication together are often recommended. Medication is a prescriber's decision, made with a doctor who can weigh your history and monitor how you respond.

Antidepressants are not sedatives or happy pills; they are one option among several. The same NICE guidance says antidepressants should not be offered routinely as a first step for less severe depression.⁴ It also says people have a right to decline treatment.

A smaller number of people with severe or hard-to-treat depression benefit from more intensive, hospital-based treatment. A specialist would explain that in full. Alongside any treatment, the ordinary basics still count: sleep, movement, daylight, a gentle routine, and staying in contact with other people.

They are not a cure on their own. Being told to simply exercise more can feel dismissive when you are depressed. They still matter, because they support whatever treatment you are having.

Living with depression day to day

Getting through a depressed patch usually takes smaller steps than most advice suggests. Breaking the day into manageable pieces helps. So does doing one thing rather than the whole list, and so does treating rest as allowed rather than earned.

In depression, activity tends to come before motivation, not after it. A small action taken while you still feel flat is worth more than waiting to feel ready.

At work or school, a depressed period can make ordinary tasks feel enormous. Some people manage with quiet adjustments; others need time signed off. A doctor or therapist can help you think through what is realistic.

In relationships, depression can make a person withdraw just when they most need company. Telling the people close to you what is happening, even briefly, tends to help more than hiding it.

Recovery rarely runs evenly. A dip after a good stretch is not a failure, and it does not undo the progress already made.

Noticing your own early warning signs helps, as does keeping the supports that worked, and staying in touch with a professional. Together they make a further episode easier to catch early and manage.

Recovery: what to expect

Depression lifts for most people who get support, though not always as quickly as they would like. Some people have one episode and never another, while others live with depression that comes and goes across the years, and learn to recognise and manage it well. Neither outcome is a measure of how hard you are trying.

There is effective treatment for mild, moderate and severe depression. Getting help early tends to make recovery quicker and relapse less likely, which is reason enough to reach out sooner, rather than waiting to see whether it passes.

If someone you love is depressed

Supporting someone who lives with depression can leave you feeling helpless. Small, steady support matters more than the perfect words. Listen without rushing to fix things, and take what they say seriously.

Telling someone to snap out of it, or to count their blessings, tends to add shame rather than relief. It usually comes from care, and it still does not help.

Practical steps often feel impossible from inside depression. Making an appointment, or going along to it, is real help. Watch for signs that things are getting worse. Take any talk of suicide seriously, rather than hoping it passes.

Look after yourself too. Supporting someone through a long illness is easier to sustain when you have your own support in place.

If you are thinking about suicide

Depression can bring thoughts that life is not worth living, or that other people would be better off without you. These thoughts are a symptom, not the truth. They can ease with help.

More than 720 000 people die due to suicide every year,² and far more people have felt exactly this way and come through it.

If you are having these thoughts, please tell someone today. That could be a doctor, a therapist, a trusted person in your life, or a crisis line.

You can reach a trained volunteer through these helplines and crisis lines from around the world. If you are in immediate danger, contact your local emergency services. Reaching out is a sign of strength, and you deserve support.

Finding help

Depression is treatable. Reaching out is often the hardest step, and the one that matters most.

If you are ready to talk to someone, you can find a therapist who fits you. The TherapyRoute directory lists qualified professionals near you or online. Whatever form your depression has taken, you do not have to work it out alone.

This article is for general information and is not a substitute for professional assessment or care. If this is affecting your life, consider reaching out to a qualified mental health professional.

References

1. [1] World Health Organization (2025). Depressive disorder (depression) - fact sheet. who.int/news-room/fact-sheets/detail/depression. who.int.
2. [2] World Health Organization (2025). Suicide - fact sheet. who.int/news-room/fact-sheets/detail/suicide. who.int/news-room/fact-sheets/detail/suicide.
3. [3] Bains N, Abdijadid S (2023). Major Depressive Disorder. StatPearls, NCBI Bookshelf. ncbi.nlm.nih.gov/books/NBK559078. ncbi.nlm.nih.gov/books/NBK559078.
4. [4] National Institute for Health and Care Excellence (2022). Depression in adults: treatment (NG222). nice.org.uk/guidance/ng222. nice.org.uk.