Childhood periodic syndromes13 14
| Condition | Usual age of onset | Description of episodes | Typical duration |
|---|---|---|---|
| Benign paroxysmal torticollis | Infancy | Head tilt, ataxia, lethargy, irritability, pallor, vomiting | Hours–days |
| Benign paroxysmal vertigo of childhood | Preschool age | Dizziness, ataxia, pallor, vomiting | Minutes |
| Abdominal migraine | School age | Severe central abdominal pain, pallor, lethargy | Hours–days |
| Cyclical vomiting | School age | Severe nausea, vomiting, pallor, lethargy | Hours–days |