| Symptom or sign | Likely differential diagnosis |
| Unilateral tremor, leg tremor, rigidity, bradykinesia, rest tremor | Parkinson disease |
| Gait disturbance | Parkinson disease; cerebellar tremor |
| Irregular, jerky tremor | Dystonic tremor |
| Isolated head tremor with abnormal posture (head tilt or turning) | Dystonic tremor |
| Sudden or rapid onset | Functional (psychogenic) tremor; toxic tremor |
| Current drug treatment that may cause or exacerbate tremor | Drug-induced or toxic tremor |
