Tremors

What Tremors Measure

Clinically, tremor is sorted by frequency, amplitude, and what brings it on. Physiologic tremor is a high-frequency (10 to 12 Hz), bilateral, symmetric action tremor tied to a known, often temporary cause, such as a medication, low blood sugar, or hyperthyroidism.^[1] That's different from a pathologic tremor like essential tremor, a distinct neurologic condition with its own diagnostic pattern rather than an exaggerated version of the normal baseline.^[1]

How It's Logged

There's no consumer wearable that measures tremor amplitude directly. Tracking apps log it the same way research diaries do: a self-rated severity entry for the day, which turns an intermittent, easy-to-dismiss shakiness into a dated record.

Why People Track Tremors

Because physiologic tremor has known triggers, a log that pairs tremor with other data can show whether shakiness is following one of them. Hyperthyroidism is a recognized cause, tied to the hyperadrenergic, hypermetabolic state that excess thyroid hormone produces throughout the body.^[2] Caffeine is another commonly logged trigger, though as the research below shows, the evidence for it is more mixed than the reputation suggests.

Logged over time, a tremor entry next to a caffeine total, a thyroid lab value, or a cycle day gives that shakiness a pattern to test instead of a guess.

How Go Go Gaia Tracks Tremors

Go Go Gaia logs tremors with a 1-click severity entry. Every entry is charted against your cycle phase and everything else you track, including caffeine intake from the food logger and any thyroid lab values you've uploaded, so a link to a trigger becomes visible as a repeating pattern instead of a one-off guess.

What the Research Shows

Hyperthyroidism affects an estimated 1.3% of the US population, with the 1977 Whickham Survey finding it roughly 10 times more common in women than men (2.7% versus 0.23%).^[2] Tremor is described as part of the hyperadrenergic, hypermetabolic state driven by excess thyroid hormone, alongside a wider set of symptoms tied to that same mechanism.^[2]

Caffeine's link to tremor is the textbook teaching, physiologic tremor is described as aggravated by caffeine in contrast to essential tremor, which usually isn't.^[1] But the controlled evidence is thinner than that reputation suggests. A double-masked, placebo-controlled study of 17 surgeons found caffeine raised hand tremor amplitude by 31% versus baseline, but that difference wasn't statistically significant against placebo.^[3] An earlier study found a single 325 mg dose of caffeine didn't measurably increase physiologic, essential, or parkinsonian tremor at one, two, or three hours after ingestion, even though some participants believed coffee made their hands shakier.^[4]

Related Terms

Frequently Asked Questions

Educational information based on published sources. Not medical advice. For personal concerns, please consult your doctor.

What's the difference between physiologic and pathologic tremor?

Physiologic tremor is a fine, fast, low-amplitude tremor everyone has, and it's usually only noticeable when it's exaggerated by a known cause, such as hyperthyroidism or a medication.^[1] Pathologic tremor, like essential tremor, is a distinct condition with its own diagnostic features, separate from an exaggerated normal tremor.^[1]

Does hyperthyroidism cause tremor?

Yes. Tremor is a recognized feature of hyperthyroidism, tied to the hyperadrenergic, hypermetabolic state that excess thyroid hormone creates in the body.^[2] It's one of the reasons tremor onset gets studied alongside thyroid function.

Does caffeine cause tremor?

The evidence is mixed. Physiologic tremor is textbook-described as aggravated by caffeine,^[1] and a study of surgeons found tremor amplitude rose 31% after caffeine versus placebo, though that difference wasn't statistically significant.^[3] An earlier controlled study found a single dose of caffeine didn't measurably increase tremor in healthy volunteers, even though some people report feeling shakier after coffee.^[4]