While most of us have heard about the most commonly discussed mental disorders such as obsessive-compulsive disorder or schizophrenia, there are a number of unusual psychological conditions that are neglected by virtue of the fact that they are rare, bizarre or simply unknown.
Erotomania is a type of delusional disorder where the affected person believes that another person is in love with him or her. This belief is usually applied to someone with higher status or a famous person, but can also be applied to a complete stranger. Erotomanic delusions often occur in patients with schizophrenia and other psychotic disorders, but can also occur during a manic episode in the context of bipolar I disorder.(wikipedia)
TrichotilloMania is an impulse control disorder, characterised by the compulsive urge to pull out one’s hair, which (depending on where the hair is pulled from) leads to hair loss balding and distress, and often social or functional impairment.Trichotillomania may be present in infants, but the peak age of onset is 9 to 13. It may be triggered by depression or stress. Owing to social implications, the disorder is often unreported and it is difficult to accurately predict its prevalence; the lifetime prevalence is estimated to be between 0.6% and 4.0% of the overall population.(wikipedia)
Autophagia (eating one’s own body) is not classified as a mental disorder or a symptom of a mental disorder.However, Autophagia could be classified under the DSM’s Impulse-Control Disorders Not Elsewhere Classified. Impulse-Control Disorders involve failing to resist an impulse, drive, or temptation to perform an act that is harmful to the person or to others. The majority of individuals affected by this disorder will often feel a sense of tension or arousal before committing the act, and then experience pleasure, gratification or relief at the time of committing the act. Once the act has been completed, the individual may or may not feel regret, self-reproach, or guilt.(wikipedia)
4. Stendhal Syndrome
Stendhal syndrome is characterized by Physical and emotional anxiety when the person is exposed to an influential dose of art, we can name this syndrome in the cases where the patient can’t endure the great beauty, like in nature.Although psychiatrists have long debated whether it really exists, its effects on some sufferers are serious enough for them to require treatment in hospital and even antidepressants.(wikipedia)
5. Cotard Delusion
Cotard delusion is a rare mental illness in which the affected person holds the delusional belief that he or she is already dead, does not exist, is putrefying or has lost his or her blood or internal organs; yet said delusion of negation is not a symptom essential to the syndrome proper.However, people having this syndrome usually become isolated from others and ignore their cleanliness and their safety.