Depression is more than simply feeling unhappy or fed up for a few days.
Most people go through periods of feeling down, but when you're depressed you feel persistently sad for weeks or months, rather than just a few days.
Some people think depression is trivial and not a genuine health condition. They're wrong it is a real illness with real symptoms. Depression isn't a sign of weakness or something you can"snap out of"by "pulling yourself together".
The good news is that with the right treatment and support, most people with depression can make a full recovery.
Depression affects people in different ways and can cause a wide variety of symptoms.
They range from lasting feelings of unhappiness and hopelessness, to losing interest in the things you used to enjoy and feeling very tearful. Many people with depression also have symptoms of anxiety.
There can be physical symptoms too, such as feeling constantly tired, sleeping badly, having no appetite or sex drive, and various aches and pains.
The symptoms of depression range from mild to severe. At its mildest, you may simply feel persistently low in spirit, while severe depression can make you feel suicidal, that life is no longer worth living.
Most people experience feelings of stress, unhappiness or anxietyduring difficult times. A low mood may improve after a short period of time, rather than being a sign of depression. Life-changing events, such as bereavement, losing your job or even having a baby, can bring it on.
People with a family history of depression are more likely to experience it themselves. But you can also becomedepressed for no obvious reason.
It affects men and women, young and old.
Studies have shown that about 4% of children aged five to 16 in the UK are anxious or depressed.
Treatment for depression can involve a combination of lifestyle changes, talking therapies and medication. Your recommended treatment will be based on whether you have mild, moderate or severe depression.
If you have mild depression, your doctor may suggest waiting to see whether it improves on its own, while monitoring your progress. This is known as "watchful waiting". They may also suggest lifestyle measures such as exercise and self-help groups.
Talking therapies, such as cognitive behavioural therapy (CBT) , are often used for mild depression that isn't improving or moderate depression. Antidepressants are also sometimes prescribed.
For moderate to severe depression, a combination of talking therapy and antidepressants is often recommended. If you have severe depression, you may be referred to a specialist mental health team for intensive specialist talking treatments and prescribed medication.
Many people with depression benefit by making lifestyle changes, such asgetting more exercise, cutting down on alcohol, giving up smoking and eating healthily.
Reading a self-help book or joining a support group are also worthwhile. They can help you gain a better understanding about what causes you to feel depressed. Sharing your experiences with others in a similar situation can also be very supportive.
Depression is more than simply feeling unhappy or fed up for a few days. Most people go through periods of feeling down, but when you're depressed you feel persistently sad for weeks or months, rather than just a few days. Some people think depression is trivial and not a genuine health condition.
Read about the symptoms of depression, which can be mild, moderate or severe. Symptoms can also be classed as psychological, physical and social.
Read about what causes depression. There's no single cause and many possible risk factors.
Find out how depression is diagnosed. Your GP will ask you lots of questions about your general health and how your feelings are affecting you mentally and physically.
Find out how depression is treated. Treatment depends on how severe your depression is, but usually involves a combination of self-help, talking therapies and medication.
Information and advice about coping with depression, including diet and exercise, talking therapy, dealing with bereavement and caring for someone who's depressed.
Read about psychotic depression, a severe form of depression where people experience the usual symptoms of depression, plus delusions and hallucinations.
Vanessa Phillips was known as a strong person and always willing to help others. When she had a breakdown, her friends didnt know she needed help.
Having experienced bullying, abuse and depression, talk show host Trisha Goddard knows what its like to hit rock bottom. She tells how she fought against the odds.