– Major depressive disorder/ MDD
Major depressive disorder or MDD ranges from low to severe depending on the severity of the symptoms. In MDD, clients usually feel depressed, low, or sad most of the time during most days of the week. It requires the symptoms to last for a minimum of two weeks to reach a diagnostic criterion.
– Persistent mood disorders
In persistent mood disorder, the symptoms are persistent and usually fluctuate from mild to severe depression and last for at least a year or more. Persistent mood disorder describes two conditions known as cyclothymia and dysthymia. In cyclothymia, the clients show mild to moderate symptoms of depression which persistently lasts for a couple of weeks to months, although at times the mood may become normal and stable for months at a time. It takes a prolonged period of observation to make a diagnosis. In dysthymia, the symptoms are of mild intensity for a prolonged duration of time, however, don’t match with the criteria of recurrent depressive disorder.
– Bipolar disorder:
In bipolar disorder, the clients usually report recurrent episodes of hypomania, mania, and depression. It involves extreme and sudden changes in mood. In hypomania, clients usually experience a persistent elevation of mood, increased energy and activity, increased sexual urges, and decreased need for sleep. In mania, the symptoms are usually much heightened than that of hypomania and often the clients lose the normal social inhibitions. In bipolar disorder, client can experience both manic as well as depressive symptoms, and usually, the symptoms oscillate within a few weeks of time.
– Postnatal or Postpartum depression
Postpartum depression can affect both males and females and occurs in the weeks or months after a child is born.
– Seasonal Affective Disorder
SAD, now known as major depressive disorder with seasonal patterns, is a type of major depression that is experienced during the winter months where there is a reduction of sunlight. It most commonly alleviates during the spring and summer months. Light therapy is one of the main ways that SAD can be treated.
– Severe depressive episode with psychotic symptoms
This type of depression involves symptoms of major depression but also includes symptoms of psychosis. These symptoms include hallucinations, paranoia, and delusions. Individuals that are diagnosed with psychotic depression often hear and see things that are not there, have false beliefs or conspiracy theories, and/or believe that people are trying to harm them. This type of depression is treated with antidepressants and antipsychotic drugs.
– Premenstrual Dysphoric Disorder (PMDD)
PMDD is experienced in women at the start of their period. They experience the common symptoms of depression that are alleviated through antidepressants or oral contraceptives.
– Atypical depression
This type of depression is often referred to as depression with atypical features. This includes symptoms where a patient’s depressed mood can brighten in response to good news or positive events. Other key symptoms include increased appetite or hyperphagia, sleeping too much, feeling that your arms or legs are heavy, and feeling rejected.
– Treatment-Resistant Depression
This type of depression is diagnosed after several methods of treatment fail to alleviate the symptoms and cure the illness.