Dyskinesia is an involuntary muscle movement and irregular in motion. Patients may experience writhing or wriggling in their arms or feet, rocking or head bobbing, or swaying. Dyskinesia ranges in severity and may affect only part of the body, such as one leg or arm, or the whole body. Dyskinesia can also affect the mouth and face (lip pursing movements). For some patients, it is a minor annoyance. For others, it causes embarrassment and may interfere with daily activities such as feeding, dressing, writing, walking, and balance. Dyskinesia usually occurs when the level of levodopa is highest in a patient. A patient may experience kicking leg dyskinesia when their medications start to kick in and wear-off, but this is very uncommon. Dyskinesia often increases when a patient is anxious or stressed.