Involuntary shaking or tremors in various body parts, including hands, head, and voice box, can be alarming. One benign form is essential tremor, as noted by Dr. Umeh, manifesting as a postural hand tremor or intention tremor. The same condition can lead to variations in the voice, evident upon close listening. At rest, the presence of a resting tremor is assessed, with causes ranging from Parkinson’s disease to drug-induced parkinsonism and rarer cases of supranuclear palsy.

Fevers, such as those from COVID-19, trigger the body to redirect blood from extremities to core areas, inducing shivers or “rigors” as the temperature rises to fight infection. Muscle shakes during exercise, according to Accetta, may result from fatigue or unfamiliar activity, indicating the nervous system’s effort to engage more muscle fibers.

Postural Orthostatic Tachycardia Syndrome (POTS) often presents with symptoms like lightheadedness, particularly upon standing, along with potential fainting, fatigue, shakiness, and concentration difficulties. Headaches and digestive issues are also common among sufferers.

Stroke, a more serious cause of wooziness, disrupts blood flow in the brain and is typically accompanied by severe symptoms such as facial drooping, speech difficulties, vision changes, bodily weakness, or cognitive challenges. Lastly, common causes of feeling faint include dehydration, medication effects, sudden blood pressure drops, low blood sugar, and cardiovascular conditions.

For more detailed information, please refer to Harvard Health, Stanford 25, University of Utah Health, HSS, and Harvard Health Blog for more insight on this condition.