- Metabolic
- Uremia
- Diabetes
- Toxemia
- Septicemia
- High fever
- Abdominal
- Liver abscess
- Peritonitis
- Subphrenic abscess
- Thoracic
- Aortic aneurysm
- Mediastinal glands
- Substernal goiter
- Neurological
- Encephalitis
- Meningitis
- Brain tumor
- Psychogenic
- Hysterical
- Neurosis
- Epidemic hiccoughs- An epidemic of hiccoughs caused by streptococcus bacteria