20 Essential Facts About Human Diseases You Never Knew

1Alzheimer's disease

Alzheimer's disease does not affect emotional memory as strongly as informational memory. As a result, Alzheimer's patient's given bad news will quickly forget the news, but will remain sad and have no idea why.


Measles can wipe out the body's immune system "memory" of other diseases for years.


Schizophrenia can be diagnosed with 98.3% accuracy using a simple eye test that tracks eye movement abnormalities.


Porphyria is a collection of diseases where symptoms include severe sun sensitivity, prominent canine teeth, and peculiar behaviors which are thought to be the basis of the vampire legends – especially as these symptoms are worsened by garlic.


Acne is the 8th-most common disease in the world. It was described in Pharaohs over 2,000 years ago. It does not affect other primates, but some cats and dogs and horses can be affected by acne.

6Musicogenic Epilepsy

”Musicogenic Epilepsy” is a rare disease that makes you have a seizure whenever you hear your favorite music.


Asthma is the most common chronic disease affecting Olympic athletes. 8% of them suffers from the condition.

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8Reverse anorexia

There are people who suffer from something called “reverse anorexia” which causes (primarily) men with already muscular bodies to feel too small.


Tuberculosis was so romanticized during the Victorian era that fashion trends emerged to highlight and emulate the symptoms of the disease. This fashion movement is referred to as “Consumptive Chic”.

10Silent Migraines

Silent Migraines are migraines that have no pain, but people experiencing them can have vision loss, flashing lights, and wavy lines in the vision, and hallucinations.


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