I'm wondering if anyone has experienced facial muscle fatigue? In the last 2-3 weeks it seems to have come out of nowhere, as these symptoms seem to do. My jaw, lips, mouth and tongue in particular are effected. It all feels quite tight with aches and stiffness. On a couple of occasions my tongue felt pretty useless and lazy in my mouth. Also lips and tongue have felt swollen although they are not. Eating and talking can sometimes be difficult. Thanks in advance.