Swollen Tongue: Causes, Symptoms, and Treatment Tremulousness, sometimes called internal tremor, vibrations or shaking, has long been recognized as a symptom of elevated sympathetic nervous system tone (a hyperadrnergic state), and it's often seen in POTS. Many people 15 Early Signs of Multiple Sclerosis Kane Hall Barry Neurology Sorry for the gross video. Has anyone had similar tongue twitching with this? My tongue has been twitching off and on for two weeks and it's painful.