11. Prosopagnosia: The inability to recognizes faces.
When a person suffers from ‘Prosopagnosia’, her/his ability to recognize face becomes impaired. The rest of her/his brain functions as usual. ‘Prosopagnosia’ occurs after acute brain damage or can be a birth defect. An estimate 2.5% of the world population suffers from this medical condition.
Several attempts at remediation using therapies have had no lasting improvement on ‘prosopagnosia’ patients. (source)
12. Auto Brewery Syndrome: getting drunk by eating any food.
A man named Nick Hess wakes up everyday feeling drunk and vomiting. This unusual medical condition occurs when the guts experiences an overgrowth of yeast turns the carbohydrates in any food consumed into alcohol. The alcohol then spreads into the blood system making the patient experience dizziness, exhaustion and nausea. Hess was suffering from ‘auto brewery syndrome’. (source)
13. Capgras delusion: false belief in identical looking impostors.
Its a delusion where the patient believes that a loved one, be it a friend, parent, spouse or any close family member has been replaced by an identical-looking impostor.
‘Capgras delusion’ is usually seen in people suffering from paranoid schizophrenia or dementia and other kinds of brain injuries. It occurs more frequently among women and are often associated with migraine attacks and diabetes.
Individual therapy is the best way to deal with ‘capgras delusion’. (source)
14. Post orgasmic illness syndrome: allergic to one’s own semen.
Some people are known to experience flu like symptoms (running nose, fever, severe exhaustion, itching of eyes) immediately after ejaculation. They are suffering from ‘post orgasmic illness syndrome’ which takes three years to cure by help of a certain ‘hyposensitization therapy’. In this therapy the patients are injected with a solution containing high concentration of their own semen over the course of a long period. (source)
15. Cotard delusion: A mental illness where you are completely sure that you are dead.
Here, the patients is totally convinced that s/he is dead, literally or figuratively. A statistical analysis based on a hundred people who believe that they are walking corpses showed that 69% of the patients were living in denial of their own existence amid feelings of depression and self-loathing.
Once there was a women known as Mademoiselle X who was utterly convinced that she deserved to die an unnatural death. Therefore she starved herself to death. (source)