I just feel sometimes like there is tension in muscles around my mouth. That cause very slight slurring, difficulty speaking clearly. 

Often there appear more symptoms together with mouth tension like super dry mouth or lightheadedness or very slight feel of numbness in whole face.

It all comes for a few hours and then fully dissappear. The more I focus on that, the longer it stays. Sometimes even for a days as I cant stop thinking about it.

As it all started with my anxiety diagnosis few years ago and I know very well how muscle tension is connected to anxiety. But not sure if it is the case when the tension is around mouth and affects your speech.

Could anybody please kindly tell what you think about it? Could it be anxiety? Or is it ALS, Multiple sclerosis or something like that? 

Thank you so much!