How common is depression in England?

One in five adults in England had a common mental health condition such as depression or anxiety in the week they were surveyed. Depression is also frequently recurrent or chronic, which is part of why earlier assessment tends to make treatment more straightforward.

Can I refer myself for talking therapy?

In England you can refer yourself directly to NHS Talking Therapies. It is still worth letting your GP know, so someone has sight of the whole picture alongside your history and any other treatment.

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Depression vs Sadness: What Is the Difference?

Q: When does sadness become depression?

Duration and reach are what separate the two. Depression lasts most of the day, nearly every day, for at least two weeks, and affects how you function at work, at home and in your relationships. A low mood that lifts within a few days is in keeping with the ordinary ups and downs of emotional variation.

Q: Am I sad or depressed?

Four questions help make sense of it: how long it has lasted, whether there is a relationship with a reason, whether you can still enjoy anything, and whether it is affecting how you function. These are a practical checklist rather than a diagnostic tool. If a low mood has lasted two weeks or more, take the question to your GP rather than trying to settle it alone.

Q: Can you be depressed without a reason?

Yes. Sadness is usually about something and eases as the situation changes. Depression may arrive with or without a trigger, and often does not lift even when things objectively improve. Life events such as bereavement or losing a job may bring it on, but people often become depressed for no obvious reason.

Q: Can you still enjoy things if you are depressed?

Sadness usually leaves your capacity for pleasure intact: you may be grieving and still be caught off guard by something funny, or still be glad a friend rang. Depression frequently removes that capacity, so the things that used to help stop helping. The clinical term for this is anhedonia, and loss of interest and enjoyment is something clinicians will always ask about.

Q: Can you be depressed and still function at work?

Yes. Functioning is a matter of degree rather than a binary, and holding it together at enormous cost is still a change in functioning. If the job is getting done but everything around it has been stripped away, or you are competent in meetings and then sit in the car for twenty minutes before you can face going into the house, that belongs in a conversation with your doctor.

Oct. 27 2026,
Depression

8 min read

Dr Hannah Nearney

Consultant Psychiatrist (MBChB, MRCPsych, MSc, PGDip(CAT), NHS Innovation Accelerator Fellow)

TL;DR

Sadness is a normal, healthy response to something. Depression is a medical condition that does not need a reason. Low mood that follows an identifiable event is proportionate and usually settles within days or weeks. Depression may arrive with or without a trigger, and often does not lift even when circumstances objectively improve (NHS, Low mood; APMS, 2023/4).
Duration and reach are what separate the two. Depression lasts most of the day, nearly every day, for at least two weeks, and affects how you function at work, at home and in your relationships (APMS, 2023/4).
Loss of interest is the signal most people miss. Sadness usually leaves your capacity for pleasure intact. Depression frequently removes it, so the things that used to help stop helping (NHS, Depression symptoms).
Depression is common and treatable. One in five adults in England had a common mental health condition such as depression or anxiety in the week they were surveyed (APMS, 2023/4). Effective treatments exist at every level of severity, from guided self-help through to specialist care (NHS, Depression overview).
If a low mood has lasted two weeks or more, take it to your GP. Your GP is the right person to ask if you are unsure whether it is depression or just sadness. Seek professional help now if you are experiencing thoughts of self harm or suicide (NHS, Low mood; NHS, Depression symptoms).

Depression vs Sadness: The Short Answer

Sadness is a normal emotional response to a specific event, and it lifts as circumstances change. Depression is a medical condition that lasts most of the day, nearly every day, for at least two weeks. Depression does not need a trigger, and it interferes with how you function day to day (NHS, Low mood; APMS, 2023/4).

The depression vs sadness distinction is straightforward to state and much harder to apply to yourself, so the rest of this article sets out four questions to work through.

Am I Sad or Depressed?

Am I sad or depressed? Is this a rough patch, or is something wrong? These questions bring a great many people to their GP and also to my clinic room. Often such queries are accompanied by an apologetic tone; I hear that other people have it worse, that nothing bad has actually happened, that they are probably wasting my time.

You do not need to come with all the answers or have "a good enough reason" to be struggling. What can help to understand the situation far more are practical ways of telling the difference between sadness and depression, so below are the questions to work through, and guidance on when it's worth making an appointment.

Sadness Is Not the Problem: Normal Sadness vs Depression

Sadness is not a symptom that needs treating. Sadness is a normal and healthy emotional response to loss, disappointment and difficulty: it's proportionate, about something, and it passes. The NHS describes this as a phase of experiencing low mood which commonly follows something identifiable and often gets better after a few days or weeks (NHS, Low mood).

In clinical practice, I would be more concerned about a patient who felt nothing after a bereavement than one who felt sad. Sadness after loss, whilst painful to experience, is also a sign that the emotional processing system is working.

When Does Sadness Become Depression? Four Questions to Ask Yourself

These four questions are a practical checklist rather than a diagnostic tool. They are here to help you make sense of your experience, not to diagnose you from an article, but they are close to the ones I would ask in a consultation. Between them they cover the ground where sadness becomes depression: how long it has lasted, the relationship with a reason, whether you can still enjoy anything, and whether it is affecting how you function.

1. How long has the low mood lasted? The two week mark for depression

Duration is a key part of building the picture, and it tends to be the question people are able to answer most clearly about themselves. Depression lasts most of the day, nearly every day, for at least two weeks (APMS, 2023/4). A low mood that lifts within a few days is in keeping with the ups and downs of regular emotional variation (NHS, Low mood).

The specific wording matters: most of the day, nearly every day. Grief comes in waves, with spells of relief in between, and has a different quality to the drag of depression that is there when you wake and still there when you go to bed.

2. Is there a relationship with a reason? Depression with or without a trigger

Sadness is usually about something, and eases as the situation changes or as you adjust to it. Depression may arrive with or without a trigger, and often does not lift even when things objectively improve (NHS, Depression overview). Life events such as bereavement or losing a job may bring it on, but often people become depressed for no obvious reason (NHS, Depression overview).

Depressed patients frequently describe events that ought to have made a difference and did not: a promotion they had worked towards for years, a holiday they had been looking forward to for months, or test results that came back clear. The event happens, they wait for the lift that should follow, and nothing shifts. When your mood has stopped responding to your circumstances, it is time to take this disconnection seriously.

3. Can you still enjoy anything? Loss of interest in depression

Few people think to check this one, yet loss of interest and enjoyment is something clinicians will always ask about (NHS, Depression symptoms).

Sadness usually leaves your capacity for pleasure intact. You may be grieving and still be caught off guard by something funny, still taste your dinner, or still be glad a friend rang. Depression frequently removes that capacity, so the things that used to help stop helping (APMS, 2023/4; NHS, Depression symptoms).

The clinical term for this is anhedonia. A person struggling with anhedonia may say something like: "I still love my friends, but I just cannot face seeing them, and when I do see them I just don't feel much at all". The same happens with the things they used to look forward to, such as the series they were halfway through, pottering in the garden, or cooking Sunday lunch. These moments have simply stopped giving anything back.

4. Is it affecting how you function? Depression and daily life

Depression affects how you function, at work, at home and in your relationships (APMS, 2023/4). Sadness hurts, but usually leaves you able to carry on.

People who are still managing to get to work very commonly assume they must be fine, because functioning gets treated as a binary: either you are coping or you are not. Functioning is a matter of degree, and holding it together but at enormous cost is still a change in functioning. If the job is getting done but everything around it has been stripped away, or you are competent in meetings and then sit in the car for twenty minutes before you can face going into the house, that belongs in a conversation with your doctor.

Sadness is about something and it passes. Depression does not need a reason and it stays. Two weeks of most days is the point to speak to a GP. If you are experiencing thoughts of self harm or suicide, you should seek help now without delay.

Sadness vs Depression Symptoms: What Else to Look For

Depression shows up in the body and mind as much as in the mood, which surprises people expecting a purely emotional condition. When comparing sadness vs depression symptoms, look out for feelings of worthlessness or guilt, poor concentration, changes to appetite and sleep, and fatigue, all of which point towards depression (APMS, 2023/4).

These symptoms rarely occur in isolation. They tend to feed one another, for example, broken sleep worsens the fatigue, the fatigue makes concentrating harder, and the whole picture becomes difficult to separate into parts.

Depression also commonly sits alongside anxiety or a physical health problem, and a third of adults in England with a physical health condition that limits their activities also have a common mental health condition such as depression or anxiety (APMS, 2023/4). Untangling what is driving what is a large part of what an assessment is for, and not something you are expected to work out on your own.

Some people may also experience thoughts of death or suicide (APMS, 2023/4). Thoughts of this kind are a recognised symptom of depression itself, not a character failing. Where they are present, please seek help now rather than waiting for the two week mark.

If you need help now

If you are having thoughts of suicide or self harm, please seek help now. Call 999 or go to A&E if you are in immediate danger. For urgent advice you can call NHS 111, and Samaritans are available free on 116 123, at any time of day or night

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Depression also comes in mild, moderate and severe forms (NHS, Depression overview). Every level warrants treatment, and the NHS sets out options for each, from guided self-help through to talking therapy and specialist care (NHS, Depression overview). Mild is not a reason to wait and see how things go on your own. Depression is frequently recurrent or chronic (APMS, 2023/4), and in my experience the sooner someone is seen, the more straightforward treatment usually is.

What to Do If It Sounds Like Depression Rather Than Sadness

See a GP if low mood has been present most days for more than two weeks (NHS, Low mood; NHS, Depression symptoms). That is the threshold. If you are experiencing thoughts of self harm or suicide, seek professional help now rather than waiting for a GP appointment. If you would find it easier to put some structure around what you have noticed first, a short depression self-assessment may help you describe it.

Many people find it helpful to know how common this is. One in five adults in England had a common mental health condition such as depression or anxiety in the week they were surveyed (APMS, 2023/4). Your GP will have had a version of this conversation several times already this week.

Treatment depends on severity and on your individual history: talking therapy, medication where appropriate, the lifestyle foundations of sleep, activity and structure, and other treatments your doctor may discuss with you (NHS, Depression overview).

In England you may also refer yourself directly to NHS Talking Therapies, although I would still advise letting your GP know (NHS Talking Therapies).

Where Flow fits: tDCS treatment for depression

As well as my clinical work as a psychiatrist, I work as UK Medical Director at Flow Neuroscience. For the treatment of depression, Flow is one of the options available.

The Flow headset is a medical device that people wear to treat depression at home. It uses a treatment called transcranial direct current stimulation (tDCS) to deliver a tiny electrical current to a part of the brain involved in mood and motivation that is less active when people are depressed (Flow Neuroscience).

The Flow headset very gently encourages activity to be restored in an area of the brain called the dorsolateral pre-frontal cortex (DLPFC). This helps to relieve symptoms of depression for people.

Flow has longstanding regulatory approval by the UK's MHRA (Medicines and Healthcare products Regulatory Agency) and has been used within a number of NHS services, including community mental health, crisis and perinatal teams, although availability varies considerably between areas.

Flow has also received regulatory approval by the TGA (Therapeutic Goods Administration) of Australia and FDA premarket approval (PMA) in the US, where it is the first at-home tDCS device approved by the FDA for depression treatment.

In Europe the Flow headset has been CE marked since 2019, and in late 2025 was awarded CE marking under EU MDR 2017/745 from its Notified Body BSI.

Flow can be used for the treatment of depression at all levels, mild, moderate and severe. In Flow's real-world data, 77% of users see their depression score improve within about three weeks (Flow Neuroscience evidence).

In a randomised controlled trial published in Nature Medicine, people with moderate or severe depression using Flow tDCS were around twice as likely to reach remission as a control group, with 57% becoming depression-free after 10 weeks of use (Woodham et al., 2024). Response varies between individuals, as it does with every treatment in psychiatry.

"I only wish I had tried it sooner. I didn't expect it to work the way it has. It has helped with brain fog, poor concentration and general low mood. I didn't realise how much I was struggling before. Feeling happier has affected the way I make choices in a hugely positive way. Instead of reacting to stress I can respond with a calm reasonable thinking mind. It took about 3 weeks of using it to see the results. People are telling me how happy I seem. I can honestly say I'm not overwhelmed anymore, and I really feel so content and light now."

Camila, 37, Flow user

Flow can be used alongside an antidepressant or as a standalone treatment, so starting it does not mean giving anything up. That is a decision to make with your doctor, and if you already take medication, please never stop it suddenly or without medical advice. There are a few situations where it is worth checking with a doctor first.

Safety Conideration

Flow should not be used whilst driving, operating machinery, moving vigorously, or when in contact with water.

If any of the following applies, seek medical advice before using Flow:

You are thinking of changing something about your current treatment, for example changing your antidepressant dosage.

You are unsure about your diagnosis.

You are pregnant, think you might be, or become pregnant while using Flow.

You currently have thoughts about suicide or harming yourself.

You have been told there is a problem with your skull or if you have metal parts in or around the brain, is fine to use Flow

You have epilepsy or have had seizures.

You have a chronic skin condition affecting your forehead, such as psoriasis.

You have bipolar disorder.

Flow, could it be right for you?

Answer a few short questions to see whether Flow might suit your situation, then talk it through with your doctor.

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Key Takeaways: The Difference Between Sadness and Depression

Sadness is about something and it passes. Depression does not need a reason and it stays.
Question one, duration. Most of the day, nearly every day, for at least two weeks.
Question two, trigger. Depression often does not lift, even when life improves.
Question three, enjoyment. Sadness usually leaves your capacity for pleasure intact. Depression frequently does not.
Question four, functioning. Still getting to work does not mean you are fine. If holding it together is costing you everything outside work, that counts and it is worth raising with your GP.
Two weeks of most days is the threshold for a GP appointment. If you are experiencing thoughts of self harm or suicide, seek help now.

Is It Depression or Just Sadness? Taking the Question to Your GP

If you are unsure whether it is depression or just sadness, please do not wait until you are certain before speaking to your GP. Bringing the question to a GP is precisely what they are there for, and being told this looks like a rough patch rather than an illness is a good outcome, not a wasted appointment.

Flow is a medical device approved for the treatment of depression. Approved treatments for depression should be discussed with and supervised by your doctor.

About the author

Dr Hannah Nearney MBChB, MRCPsych, MSc, PGDip(CAT) is a Consultant Psychiatrist specialising in general adult psychiatry, including adult ADHD, autism, and women's mental health. She is UK Medical Director at Flow Neuroscience and a founding partner at Anchor Psychiatry Group in East Anglia. She is a Fellow on the NHS Innovation Accelerator program (2026 cohort), which provides support to scale evidenced-based innovations like Flow tDCS in the NHS to enhance patient outcomes and service delivery. Follow her on Instagram: @psychiatristhannah