Internal tremors and vibrations in long COVID: a cross-sectional study.

Do people with long COVID symptoms of internal tremors and vibrations differ from others with long COVID but without these symptoms? In this cross-sectional study that included 423 adults with long COVID, 158 (37%) reported having "internal tremors, or buzzing/vibration," had worse quality of life, more financial difficulties, and higher rates of new-onset mast cell disorders and neurologic conditions, compared with others with long COVID but without internal tremors and vibrations. Internal tremors and vibrations may reflect a severe phenotype of long COVID.