Causes of Eyelid twitching

Twitching generally occurs as a result of an overwrought nervous system unloading impulses. It is most common during rest from *stress and strain. Facial twitching in adults, accompanied by rather severe facial *pain, is the result of a facial *neuralgia. In the case of *Tourette’s syndrome, a neurological disorder that develops in childhood, the muscle twitches known as tics are part of a complex nervous system disease that later involves involuntary actions, such as shoulder shrugs, shouting, or stamping movements.
*Parkinson’s disease can involve twitching and grimacing, though many other symptoms predominate. Similarly, in Huntington’s chorea, the focus is not only on the display of characteristic involuntary muscle movements, but on the psychological states of apathy, irritability and mania that are experieest and overwhelm the taste of a meal.