you may suffer from benign fasciculation syndrome, microscopic twitching of the muscles. I have those all over my body, and was concerned years back that these twitches where associated with ALS .
As the word implies, these twitches are benign. I am not sure that they really relate to PCS.
The twitches are noticeable on the skin as a flickering and they feel like bursting small bubbles. weird..huh.

Let me know if this description fits your twitching, I will than forward you some info about this syndrome.