A person with dysthymia might also experience major depression, once, twice, or more often during his lifetime. Dysthymia can sometimes come with other symptoms. When they do, it is possible that other forms of depression are diagnosed. When severe depressive illness includes hallucinations, delusions, and/or withdrawing from reality, the patient may be diagnosed with psychotic depression.
Depression is more common for people who suffer from HIV/AIDS, heart disease, stroke cancer, diabetes, Parkinson's disease, and many other illnesses. According to studies, if a person has depression as well as another serious illness he or she is more likely to have severe symptoms, and will find it harder to adapt to his medical condition. Studies have also shown that if these people have their depression treated the symptoms of their co-occurring illness improve.
- atypical depression (sub-type of major depression or dysthymia
- chronic depression is a major depressive episode that lasts for at least two years
- endogenous depression is defined as feeling depressed for no apparent reason
- situational or reactive depression (also known as adjustment disorder with depressed mood) that develops in response to a specific stressful situation or event like job loss, end of a relationship, death in family, etc.
- agitated depression which is a type of major depressive disorder
- psychotic depression is a major depressive disorder with psychotic symptoms like hallucination and delusions
- melancholic and catatonic depression which are sub-types of major depressive disorder