Fibryomyalgia or polymyalgia.
Fibromyalgia syndrome
There are many answers possible for this vague question, however, you may be thinking of fibromyalgia.
Bipolar Disorder is characterized by heavy mood swings that occur randomly. The exact cause of bipolar disorder is unknown but there seem to be some factors that help trigger bipolar episodes. Some of these causes include differences in neurotransmitters, biological parts, hormones or inherited traits. Also, stress and traumatic events may play a large role in developing bipolar disorder.
Unknown at this time.
The red scrotum syndrome is characterized by persistent redness of the anterior half of the scrotum that may involve the base of the penis. It is usually accompanied by a persistent itching or burning sensation and hyperalgesia. It is a chronic condition that is resistant to treatment and its cause is unknown.
This is still mostly unknown.
Fibromyalgia is an inherited disorder - yet the cause is unknown and it is not contagious.
If you are a woman and over over 40, it could be the side effects of menopause. When your estrogen levels begin to fall, chronic fatigue, back pains and so many other unknown ailments and pains begin. If you are within this group of people, have your doctor check your estrogen levels. I found that Estroven, sold over the counter, has done wonders for me. Good luck.
unknown, its probably not a single gene but instead many
Menier's disease is a life-disturbing disorder/disease of the inner ear that is characterized by a triad of symptoms, including severe vertigo, hearing loss, and tinnitus (ringing in the ear). The exact cause of the disease is unknown, however it has to do with an imbalance of the endolymphatic fluid located in the cochlea (the sensory organ of hearing).
Rhinophyma is a skin disorder characterized by a large, red, bumpy, or bulbous nose. It can occur as part of phymatous rosacea. The exact cause of rhinophyma is unknown, but it's considered a subtype of severe rosacea.
Chell is diagnosed with a special speaking disorder unknown to the player