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Symptoms can sometimes disappear for weeks or months at a time.
Onset before the age of 21. Typically, tics increase as a result of tension or stress, and decrease with relaxation or concentration on an absorbing task. The cause has not been established, but current research suggests that the disorder stems from the abnormal metabolism of at least one brain cell. The majority of people with TS are not significantly disabled by their tics and don ' t require medication. However, there are medications available to help control the symptoms when they interfere with functioning.