Mood disorders encompass several disorders that cause some form of emotional disturbances. Depressive, bipolar, manic and anxiety-related disorders fall into this category. The diagnosis mandates a thorough and meticulous patient history.
Mood changes may be a constitutive feature of several psychiatric disorders and a broad classification based on the nature of the disorder (sadness or elation) can be made into depressive and manic mood changes, each presenting with distinct clinical features  :
- Depressive disorders - Numerous subtypes have been described in literature - major depressive disorder, persistent depressive disorder, substance or medication induced, depression occurring as a result of another disease, premenstrual dysphoric disorder and unspecified forms  . The presence of irritable or sad mood that substantially influences everyday life of affected individuals due to somatic and cognitive disturbances is a common finding in all of them, but their distinction can be made according to the duration, onset or the underlying etiology . For example, major depressive disorder is diagnosed when mood changes last for at least two weeks, while persistent depression is suspected if symptoms last for two years in adults and one year in children . Moreover, patients may suffer from psychotic, melancholic or catatonic episodes that can mislead the physician from depression as the underlying disorder.
- Mania and hypomania - Abnormally irritable and expansive mood present for one week accompanied by symptoms such as elevated self-esteem, decreased need for sleep, psychomotor agitation, racing thoughts, increased goal-directed activity and a propensity for distraction by irrelevant or unimportant stimuli are hallmarks of a manic episode  . A fast rate of speech, verbosity, accelerated mental and physical activity, and personal belief that he/she is at an excellent mental state is often encountered, which can be dangerous or even life-threatening. A hypomanic state is described as a milder form of mania, lasting at least four days and presenting with less severe clinical symptoms than that observed in manic patients .
- Bipolar disorders - When manic episodes, depression, and/or hypomania are all seen in one individual, the diagnosis of a bipolar disorder should be suspected. Like in depressive disorders, several clinical types are recognized - type I, type II, drug-induced, etc. , while cyclothymia denotes a less severe form.
Entire Body System
Family History of Depression
It is not clear whether people who have had depression before, or have a family history of depression, are more prone to this complication, and its causes are not understood. [benzo.org.uk]
However, it can also occur in people who have no family history of depression.  Major depressive disorder is prevalent in a large number of elderly patients, resulting in a significant increase in the number of suicides in this population. [faqs.org]
Abstract Hypoxemia is a common complication of the diseases associated with the central nervous system, and neurons are highly sensitive to the availability of oxygen. [ncbi.nlm.nih.gov]
Gaucher disease (GD) is a lysosomal storage disorder with a wide spectrum of phenotypic presentations. We report the case histories of two adult brothers with GD who developed both parkinsonism and psychiatric symptoms. [ncbi.nlm.nih.gov]
Feeling of Worthlessness
Affective disorders may include manic (elevated, expansive, or irritable mood with hyperactivity, pressured speech, and inflated self-esteem) or depressive (dejected mood with disinterest in life, sleep disturbance, agitation, and feelings of worthlessness [britannica.com]
Other symptoms of depression may include: changes in appetite, sleep disturbances, low energy, difficulty thinking or concentrating, feelings of worthlessness and guilt, anxiety and thoughts of suicide. [newmarkeducation.com]
[…] of worthlessness or guilt Difficulty concentrating Recurrent thoughts about suicide Major depressive disorder is much more common in women than in men. [sparknotes.com]
Symptoms, that are persistent and interfere with daily life, can include: Sadness or loss of interest or pleasure in activities the person used to enjoy Weight loss Difficulty sleeping or oversleeping Energy loss Feelings of worthlessness Thoughts of [wexnermedical.osu.edu]
Dysthymic disorder can be characterized as a chronic low-grade depression, persistent irritability, and a state of demoralization, often with low self-esteem. [healthychildren.org]
Bipolar Disorder can manifest in many ways, including: difficulty falling or staying asleep, difficulty waking up in the morning, chronic fatigue, anxiety, low self-esteem, high irritability and risky or destructive behaviors. [newmarkeducation.com]
These mood disorders share some common symptoms: Slowness in motor behavior/speech Slowed thought processes Blunted emotions Poor grooming Social withdrawal Weight loss/gain Early morning awakening Excessive sleeping Low self-esteem Agitation In addition [bhevolution.org]
In contrast, during an episode of depression, a person can suffer from feelings of worthlessness, loss of interest, low self-esteem, and lack of energy. [pamf.org]
Symptoms may include: Persistent feelings of sadness, hopeless or helpless Having low self-esteem Excessive guilt Feelings of wanting to die Suicidal thoughts or attempts Loss of interest in usual activities or activities once enjoyed Difficulty with [texaspanhandlecenters.org]
Bipolar disorder (previously known as manic-depressive disorder) is characterized by an elated or euphoric mood, quickened thought and accelerated, loud, or voluble speech, overoptimism and heightened enthusiasm and confidence, inflated self-esteem, heightened [britannica.com]
Mood disorders exist at these extremes of thought and feeling. They have two additional characteristics. First, they are characterized by mood states that are more intense than people normally experience in their daily lives. [cnn.com]
Euphoric moods, moods that bring about feelings of invincibility or grandiosity, and moods that lead to impulsive behavior or keep a person awake for days might all indicate a manic episode, such as those seen with bipolar. [goodtherapy.org]
mood, excessive talkativeness, irritability, increased activity levels, and other symptoms mood disorder one of a group of disorders characterized by severe disturbances in mood and emotions; the categories of mood disorders listed in the DSM-5 are bipolar [courses.lumenlearning.com]
Depression may be linked to a variety of causes, including genetic, environmental, psychological and biochemical factors. [wexnermedical.osu.edu]
The most dangerous consequence of severe depression is suicide. Depression is a much more common illness than mania, and there are indeed many sufferers from depression who have never experienced mania. [britannica.com]
depressive patients. 61 54 Gos T...Bogerts B 18574609 2008 45 BDNF gene: functional Val66Met polymorphism in mood disorders and schizophrenia. 54 61 Rybakowski JK 19018714 2008 46 The tryptophan hydroxylase gene influences risk for bipolar disorder but [malacards.org]
Depression can dramatically impair a person’s ability to function both in social situations and at work. [disability-benefits-help.org]
The diagnosis of a mood disorder can be quite challenging, having in mind the diverse clinical presentation and its variable appearance in patients. In addition, concomitant presence of anxiety disorders (social phobias, obsessive-compulsive disorders, or even panic attacks) may be noted, creating an even bigger issue to discern between the disorders . For this reason, physicians must bear in mind that a long and carefully obtained patient history is the essential component during workup, as the majority of symptoms may not be evident during the hospital visit, but more importantly, because the diagnosis is made almost solely on clinical criteria  . Not all patients will be able to describe typical changes seen in mood disorders, and some will not even admit that anything extraordinary is happening, which is why parents, close friends or even relatives can be interviewed as well. Apart from determining symptoms related to mood changes, physicians must inquire about recent use of drugs or substances that can induce such changes  , but also exclude some organic diseases that may mimic depression . Thyroid hormone levels should be measured to exclude hypothyroidism, while folate, B12 and a complete blood count are recommended in the diagnostic workup as well .
BACKGROUND: There is suggestive evidence that prior illness history may have little association with response to long-term treatment in bipolar disorder (BD) or recurrent major depressive disorder (MDD), but relationships of illness-history to treatment-response [ncbi.nlm.nih.gov]
No specific treatment is required, other than support and reassurance. [emedicine.com]
This change is of concern because a large proportion of patients with mixed features are now unspecified, and this may influence treatment planning and prognosis. [ncbi.nlm.nih.gov]
Like cancer, "mood disorder" is a general term for a group of disorders that can vary widely in terms of symptoms, prognosis and treatment. [cnn.com]
Early detection and appropriate treatment can lead to a better prognosis. [childmind.org]
The etiology of the mental illness could be related to the processes contributing to the development of parkinsonism. [ncbi.nlm.nih.gov]
[…] irritable or sad mood that substantially influences everyday life of affected individuals due to somatic and cognitive disturbances is a common finding in all of them, but their distinction can be made according to the duration, onset or the underlying etiology [symptoma.com]
Centers for Disease Control and Prevention National Center for Health Statistics Office of Analysis, Epidemiology & Health Promotion, Room 6433 Hyattsville USA 2. National Institute of Mental Health Bethseda USA 3. [doi.org]
Keywords: age of onset, mood disorders, anxiety disorders, alcohol use disorders, comorbidity, NESARC, epidemiology 1. [ncbi.nlm.nih.gov]
This paper reviews the studies on the pathophysiology of SAD with emphasis on circadian, neurotransmitter, and genetic hypotheses. [ncbi.nlm.nih.gov]
[…] dependence are consistently associated with a higher prevalence of psychiatric comorbidities, could be considered important predictors of other psychiatric disorders, and deserve greater public heath attention, pointing to the need for alcohol abuse prevention [ncbi.nlm.nih.gov]
These fund allow the American Foundation for Suicide Prevention to invest in new research, create educational programs, advocate for public policy, and support survivors of suicide loss. [dartmouth-hitchcock.org]
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- Tolliver BK, Anton RF. Assessment and treatment of mood disorders in the context of substance abuse. Dialogues Clin Neurosci. 2015;17(2):181-190.
- Porter RS, Kaplan JL. Merck Manual of Diagnosis and Therapy. 19th Edition. Merck Sharp & Dohme Corp. Whitehouse Station, N.J; 2011.