Alty JE, Kempster PA. A practical guide to the differential diagnosis of tremor. Postgrad Med J. 2011;87(1031):623-629. There are currently no diagnostic tests for internal tremors. However, anyone experiencing a tingling sensation, shaking, muscle weakness, or poor coordination should speak with a doctor. The facts about essential tremor. International Essential Tremor Foundation. https://essentialtremor.org/resource/the-facts-about-essential-tremor/. Accessed Dec. 7, 2021. In select cases when there is significant diagnostic uncertainty, single-photon emission computed tomography using ioflupane can be useful for distinguishing Parkinson disease from other tremor types. Surgical procedures may be performed when tremor does not respond to medications or severely impacts daily life.

A Tremor in the Blood: Uses and Abuses of the Lie Detector A Tremor in the Blood: Uses and Abuses of the Lie Detector

Includes classic cerebellar, dystonic, and drug-induced tremors; essential tremor can cross over to this category

Uitti RJ. Tremor: how to determine if the patient has Parkinson's disease. Geriatrics. 1998;53(5):30-36.

Tremor | National Institute of Neurological Disorders and Stroke Tremor | National Institute of Neurological Disorders and Stroke

Essential tremor typically occurs on both sides of the body, but symptoms are more noticeable on the dominant side. Mayo Clinic: "Essential Tremor," "Multiple sclerosis," "Vitamin Deficiency Anemia," "Pheochromocytoma," "Hypoglycemia."Like adrenaline, caffeine is a stimulant, which raises your level of alertness and stimulates your nerves. While it can be useful for keeping you alert, large quantities of caffeine in a short period can lead to tremor and palpitations. Medications A person may experience internal tremors in the trunk, arms, legs, or internal organs. Internal tremors are not harmful, but they be can be worrying and may interfere with a person’s daily life. Episodes of low blood sugar, also known as hypoglycaemia, or 'hypos', are most common if you have diabetes treated with insulin, or type 2 diabetes treatment with sulfonylurea (SU) tablets. It is normal to have shaky hands. This is especially true if a person is feeling stressed or anxious or has had insufficient sleep. Though the results of polygraph tests have been repeatedly deemed unreliable, the machines are still widely used to screen government employees, question suspected criminals, investigate possible terrorists, and more. In addition, increasingly sophisticated methods of 'lie detection' are being devised, such as brain fingerprinting, Functional MRI brain scans, pupil dilation, guilty knowledge tests, artificial intelligence, machine learning, and more.