What are the signs of Clinical Depression?

A friend of mine insists that she has Clinical Depression. what are the signs/symptoms of this mental health disease?

FROM WIKIPEDIA:
Major depression is a serious illness that affects a person's family, work or school life, sleeping and eating habits, and general health.[1] its impact on functioning and well-being has been equated to that of chronic medical conditions such as diabetes.[2]

A person suffering a major depressive episode usually exhibits a very low mood that pervades all aspects of life and an inability to experience pleasure in activities that formerly were enjoyed. Depressed people may be preoccupied with, or ruminate over, thoughts and feelings of worthlessness, inappropriate guilt or regret, helplessness, hopelessness, and self-hatred.[3] Other symptoms include poor concentration and memory,[4] withdrawal from social situations and activities, reduced sex drive, and thoughts of death or suicide. Insomnia is common: in the typical pattern, a person wakes very early and is unable to get back to sleep.[5] Hypersomnia, or oversleeping, is less common.[5] Appetite often decreases, with resulting weight loss, although increased appetite and weight gain occasionally occur.[3] The person may report multiple physical symptoms such as fatigue, headaches, or digestive problems; physical complaints are the most common presenting problem in developing countries according to the World Health Organization's criteria of depression.[6] Family and friends may notice that the person's behavior is either agitated or lethargic.[5]

FOR DSM IV CRITERIA GO TO THE WEBSITE BELOW, IT LISTS THEM ALL.

According to the Clinical Depression website, symptoms of clinical depression include:

Exhaustion on waking
Disrupted sleep, sometimes through upsetting dreams
Early morning waking and difficulty getting back to sleep
Doing less of what they used to enjoy
Difficulty concentrating during the day
Improved energy as the day goes on
Anxious worrying and intrusive upsetting thoughts
Becoming emotional or upset for no particular reason
Shortness of temper, or irritability

For more information, please feel free to check out my source.
Lots of people don't realize that clinical depression is a real, serious, and life-threatening illness. if your friend has told you that she has this disease, then please, give her all your support as a friend should.

* Feeling worthless or excessive guilt
* Having difficulty thinking, concentrating or making decisions
* Feeling like you want to hurt or kill yourself, having repeated thoughts of suicide. You’ve tried to attempt suicide or you have a specific plan on how you will kill yourself. (If you feel like hurting yourself, call a 24 hour crisis hotline, 800-273-8255 or 800-784-2433 or call “911” or go to the nearest emergency room.)

* Losing or gaining a significant amount of weight or not wanting to eat or overeating
* Having difficulty sleeping or over sleeping
* Feeling physically agitated/restless or slowed down (which is noticeable by others)
* Feeling extremely tired and having no energy or little or no motivation to do anything
* Wanting to isolate and not be with people
* Feeling pessimistic or hopeless about the future
* Feeling more irritable than usual
* Crying more than usual or crying easily
* Low self-esteem. Feeling more self-critical or like a failure
* Change in sexual interest or drive
* Experiencing psychotic signs such as hallucinations (hearing voices) or delusions (false beliefs)
It's all different and you may not have all those symptoms.Hoped i helped a little
I wish you the best of luck

DSM-IV-TR and ICD-10 criteria
The most widely used criteria for diagnosing depressive conditions are found in the American Psychiatric Association's revised fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR), and the World Health Organization's International Statistical Classification of Diseases and Related Health Problems (ICD-10) which uses the name recurrent depressive disorder.[95] The latter system is typically used in European countries, while the former is used in the US and many other non-European nations,[96] and the authors of both have worked towards conforming one with the other.[97]
Major depressive disorder is classified as a mood disorder in DSM-IV-TR.[98] The diagnosis hinges on the presence of a single or recurrent major depressive episode.[3] Further qualifiers are used to classify both the episode itself and the course of the disorder. The category Depressive disorder not otherwise specified is diagnosed if the depressive episode's manifestation does not meet the criteria for a major depressive episode. The ICD-10 system does not use the term Major depressive disorder, but lists very similar criteria for the diagnosis of a depressive episode (mild, moderate or severe); the term recurrent may be added if there have been multiple episodes without mania.[99]
[edit]Major depressive episode
Main article: Major depressive episode
A major depressive episode is characterized by the presence of a severely depressed mood that persists for at least two weeks.[3] Episodes may be isolated or recurrent and are categorized as mild (few symptoms in excess of minimum criteria), moderate, or severe (marked impact on social or occupational functioning). an episode with psychotic features—commonly referred to as psychotic depression—is automatically rated as severe. if the patient has had an episode of mania or markedly elevated mood, a diagnosis of bipolar disorder is made instead.[100] Depression without mania is sometimes referred to as unipolar because the mood remains at one emotional state or "pole".[101]
DSM-IV-TR excludes cases where the symptoms are a result of bereavement, although it is possible for normal bereavement to evolve into a depressive episode if the mood persists and the characteristic features of a major depressive episode develop.[102] The criteria have been criticized because they do not take into account any other aspects of the personal and social context in which depression can occur.[103] In addition, some studies have found little empirical support for the DSM-IV cut-off criteria, indicating they are a diagnostic convention imposed on a continuum of depressive symptoms of varying severity and duration:[104] excluded are a range of related diagnoses, including dysthymia which involves a chronic but milder mood disturbance,[105] Recurrent brief depression which involves briefer depressive episodes,[106][107] minor depressive disorder which involves only some of the symptoms of major depression,[108] and adjustment disorder with depressed mood which involves low mood resulting from a psychological response to an identifiable event or stressor.[109]
[edit]Subtypes
The DSM-IV-TR recognizes five further subtypes of MDD, called specifiers, in addition to noting the length, severity and presence of psychotic features:
Melancholic depression is characterized by a loss of pleasure in most or all activities, a failure of reactivity to pleasurable stimuli, a quality of depressed mood more pronounced than that of grief or loss, a worsening of symptoms in the morning hours, early morning waking, psychomotor retardation, excessive weight loss (not to be confused with anorexia nervosa), or excessive guilt.[110]
Atypical depression is characterized by mood reactivity (paradoxical anhedonia) and positivity, significant weight gain or increased appetite (comfort eating), excessive sleep or sleepiness (hypersomnia), a sensation of heaviness in limbs known as leaden paralysis, and significant social impairment as a consequence of hypersensitivity to perceived interpersonal rejection.[111]
Catatonic depression is a rare and severe form of major depression involving disturbances of motor behavior and other symptoms. Here the person is mute and almost stuporose, and either remains immobile or exhibits purposeless or even bizarre movements. Catatonic symptoms also occur in schizophrenia or in manic episodes, or may be caused by neuroleptic malignant syndrome.[112]
Postpartum depression (Mild mental and behavioral disorders associated with the puerperium, not elsewhere classified in ICD-10[113]) refers to the intense, sustained and sometimes disabling depression experienced by women after giving birth. Postpartum depression, which has incidence rate of 10–15% among new mothers, typically sets in within three months of labor, and lasts as long as three months.[114]
Seasonal affective disorder (SAD) is a form of depression in which depressive episodes come

What are the signs of Clinical Depression?

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