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There are some real health conditions that even the greatest hypochondriac couldn't dream up: Persistent, unwanted orgasms, an inability to feel fear, or strange fibers growing out of the skin.
While some are more controversial than others, here's a look at seven medical conditions that top out on the strangeness scale and make your weird zit look like child's play.
Morgellons diseaseSlide 2 of 15
We've all experienced some smarmy, icky incidents that make our skin crawl. But there are people who actually think there are things crawling beneath their skin.
Morgellons disease is a poorly understood condition in which people feel itching, biting and crawling under their skin. People with this condition also see filaments or fibers growing out of their skin, and can experience skin lesions, fatigue and memory problems, according to the Morgellons Research Foundation.
There is no known cause for the disease, but the Centers for Disease Control and Prevention started investigating potential causes in 2008. The medical community is divided on the disease some doctors say the symptoms are the result of mental illness, while others say the disease stems from a skin disorder, according to the Mayo Clinic.
Some health experts say the disease is caused by an unknown infectious agent. But others say that idea is flawed, because most patients with Morgellons don't show evidence of an infection (such as elevated levels of white blood cells), according to a study to be published in February in the American Journal of Clinical Dermatology.Slide 3 of 15
Alien hand syndromeSlide 4 of 15
Alien hand syndrome
The movie "Dr. Strangelove" tells the story of a man whose right hand seems to have a mind of its own. The strange condition is a reality for some people, and it's known as alien hand syndrome. People with the condition usually have a hand that reaches, grabs and holds onto things without the intention of the patient, according to a description of the syndrome in a 2004 article in the journal Archives of Neurology.
For example, a 1998 case reported in the Journal of Neurology, Neurosurgery and Psychiatry told the tale of an 81-year-old woman right-handed woman whose left hand was uncontrollable. Her left hand choked her neck and hit her face and shoulder involuntarily, and the woman also had sensory processing and visual problems.
A 2009 article in the Journal of Stroke and Cerebrovascular Diseases found that a stroke in the brain's right parietal lobe was the impetus for a case of alien hand syndrome. And an article published in December in the journal PLoS One reported that parts of the brain that control voluntary movements may be uniquely activated in cases of alien hand syndrome.Slide 5 of 15
Cotard's syndromeSlide 6 of 15
Cotard's syndrome, also called Cotard's delusion and walking corpse syndrome, is a rare condition where people think that they have either died or part of their body has decayed, according to a 2004 study in the European Journal of Neurology. The syndrome is most commonly witnessed in people who have schizophrenia and bipolar disorder, but some who suffer from migraines, tumors or trauma have also reported having Cotard's syndrome.
People with Cotard's syndrome may also believe they are missing certain organs or body parts, or they may believe their soul has died, according to a 2002 article in the journal Neurology.
The syndrome is named after Dr. Jules Cotard, a Parisian neurologist who was one of the first to induce loss of brain cells in animals, according to the Neurology article.Slide 7 of 15
Ehlers-Danlos syndromeSlide 8 of 15