Anxiety
The National Institute of Mental Health defines them as "sudden and repeated" episodes of fear of "several minutes or longer"
Panic attacks
Abbreviated PTSD, this anxiety disorder manifests in the re-experience of injurious events
Post traumatic stress disorder
Sewing accessories pair you are "on" when experiencing nervous anxiety or anticipation
Pins and needles
Caused by tension or anxiety, bruxism is this activity that occurs during Stage 2 sleep
Teeth grinding
To breathe abnormally fast & deep, as from anxiety
hyperventilate