Patients with Gilles de la Tourette syndrome (GTS) may exhibit decrements or increments of tics with heat. A 25 year old male presented for evaluation. Since 7 years of age, he experienced motor and phonic tics. At age 23 year, 5 months, he had his baseline evaluation. For the baseline evaluation please refer to Table 1 for objective assessments. Family history: His mother had TS. His sister has obsessive-compulsive disorder. He is married with one child. At age 3 and a half years, his 5-year-old son began to display motor tics, including eye blinks and simultaneous head movements to the shoulder along with shoulder shrugs, and a phonic tic, exaggerated coughing, similar to the proband. A 25 year-old man with TS underwent heat-induced dehydration and underwent a profound remission for 2 years. After a tetanus immunization, he had an exacerbation.

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