Possible Causes
Medical science has tried repeatedly to pinpoint the etiology, and many hypotheses were made, such as:
- Arsenic poisoning
- Asperger's syndrome or other Pervasive developmental disorder.
- Chagas' disease
- Chronic Fatigue Syndrome.
- Crohn's Disease
- Cyclic Vomiting Syndrome.
- Hypochondria
- Lactose intolerance
- Lupus erythematosus
- Ménière's disease
- Migraine.
- Minor, spontaneous Cerebral hemorrhage with Insomnia
- Multiple allergies
- Panic disorder with agoraphobia.
- Obsessive–compulsive disorder
- Psychosomatic disease
Read more about this topic: Charles Darwin's Health