Internal tremors are a shaking sensation felt inside the body that is not visible externally. This sensation can be unsettling, particularly when experienced during moments of rest, such as when lying down. These internal vibrations can range from subtle quivering to a more pronounced shaking.
Understanding the Sensation
The experience of internal tremors is commonly described as an internal vibration, buzzing, or trembling that cannot be seen by others. This sensation can affect various parts of the body, including the trunk, arms, legs, or internal organs. Unlike external tremors, which involve visible, involuntary muscle movements, internal tremors are a felt sensation.
People often describe it as feeling jittery or shaky inside, or like a cell phone vibrating within their body. Some individuals notice these sensations more prominently when waking up or during periods of stillness, sometimes leading to unease or anxiety.
Common Causes
The exact cause of internal tremors is not always clear, but they are frequently linked to various factors. High levels of stress and anxiety can trigger or amplify internal tremors, as stressful situations activate the body’s nervous system, increasing feelings of restlessness and shakiness. Fatigue and insufficient rest can also make internal tremors more pronounced, while stimulants like caffeine and certain medications can stimulate the nervous system.
Medication side effects can also contribute to internal tremors. Some antidepressants, asthma medications, and drugs used for psychiatric or neurological disorders are known to cause tremors. Withdrawal from substances, such as alcohol, can also lead to tremors. Alcohol shakes are a common symptom of withdrawal, occurring as the brain reacts to the absence of alcohol, typically peaking within 24 to 48 hours after the last drink.
Internal tremors are also associated with various medical conditions. Electrolyte imbalances and thyroid issues, such as an overactive thyroid (hyperthyroidism), can lead to tremors due to increased metabolic activity and nervous system stimulation. Low blood sugar (hypoglycemia) is another potential cause, as the body releases hormones like adrenaline in response to low glucose, which can trigger shakiness, sweating, and a rapid heartbeat.
Neurological conditions are also underlying causes. While external tremors are more characteristic, internal tremors can be experienced by individuals with conditions like Essential Tremor, Parkinson’s disease, and multiple sclerosis. For instance, a 2015 study reported that 55% of people with Essential Tremor, 36% with multiple sclerosis, and 33% with Parkinson’s disease experienced internal vibrations. In some cases, internal tremors may also be related to functional neurological disorder (FND) where the brain’s perception of bodily sensations is amplified.
When to Seek Medical Advice
While internal tremors are often not harmful, they can be disconcerting and may interfere with daily life. It is advisable to seek medical attention if the tremors are persistent, worsening, or significantly affect your daily activities and quality of life.
Medical evaluation is important if internal tremors are accompanied by other new or concerning symptoms. These can include weakness, dizziness, numbness, difficulty speaking or walking, anxiety, or unexplained weight changes. Consulting a healthcare provider helps rule out serious underlying conditions and determine the appropriate course of action.
Diagnostic Approaches and Management
Healthcare professionals begin the diagnostic process by taking a detailed medical history, reviewing symptoms, lifestyle habits, and medications. A physical examination helps assess overall health and neurological function.
While there are currently no specific diagnostic tests solely for internal tremors, a doctor may order various tests to identify or rule out underlying conditions. These can include blood tests to check for thyroid function or electrolyte imbalances. If neurological issues are suspected, a primary care doctor may refer to a neurologist, who might conduct tests such as an electromyogram or an MRI scan.
Management strategies often focus on addressing the identified underlying cause. If stress or anxiety are contributing factors, techniques such as deep breathing exercises and mindfulness can help calm the nervous system. Lifestyle adjustments like ensuring adequate sleep, moderating caffeine intake, and avoiding stimulants can also provide relief. If a specific medical condition is diagnosed, treatment for that condition, such as medication for thyroid issues or neurological disorders, typically helps alleviate the internal tremors.