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Tics are uncontrolled body movements or sounds.

There are many different types of tic. Some people may only have one type, while others may have several.

Some of the more common types of tic are described below.

Movement tics

Tics that result in body movements are known as "motor tics".

Common examples include:

Tics may sometimes appear to be similar to normal movements, but they cannot be controlled.

Some people are able to delay a tic for a short time, but eventually the urge to do it becomes too strong.

Sound tics

Sound tics are known as "vocal tics" or "phonic tics".

Common examples include:

Sometimes the normal flow of speech may be interrupted, or the tic may occur at the beginning of a sentence in a similar way to a stammer.