Diagnosis of TS is typically based on a comprehensive assessment of the individual's symptoms and behavior, including a review of the individual's history and detailed observation of the tics. This usually involves a detailed interview with the individual and their caregivers and a physical and neurological examination.
There are no laboratory tests that can diagnose TS. However, certain medical tests may be done to rule out other potential causes of the symptoms. These may include blood tests, urine tests, and imaging studies such as MRI scans of the brain.