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Tics are rapid, repetitive, involuntary contractions of a group of muscles.
Different types of tics
Tics are contractions of a group of muscles that either result in a movement (a motor tic) or a sound (a phonic or vocal tic).
Causes of tics
The exact cause of tics is unknown, but they are thought to be related to the connections between certain areas of the brain involved.
Treating tics
Not all tics need to be treated, although there are several different treatments that can be tried if necessary.
Complications of tics
Although many tics improve over time, they can cause a number of problems.
Diagnosing tics
Your GP should be able to diagnose a tic from a description of the symptoms and by observing them. Special tests are not usually required.