Feeling shaky or jittery when you’re sick can be uncomfortable and even alarming. Some people describe it as trembling, internal shaking, weakness, or feeling “on edge” without knowing why. While this symptom can be unsettling, it is actually a common response to illness, especially during infections like the flu, colds, or other viral conditions. Understanding why shaking happens and when it becomes a concern can help you feel more at ease and know when to seek care.
For same-day illness treatment, visit the walk-in clinic at AFC Urgent Care Denver Park Hill. Come visit us 7 days a week for testing and treatment with no appointment necessary. To plan your visit in advance, simply pre-register below.
Common Reasons You Feel Shaky During Illness
Shakiness during sickness is usually the result of your body working hard to fight infection. One of the most common causes is fever. When your temperature rises, your body may shiver or tremble in an attempt to regulate internal heat. These chills can make you feel shaky even if you’re not visibly shivering.
Another frequent cause is dehydration. Illnesses that involve fever, sweating, vomiting, or diarrhea can quickly lead to fluid loss. Dehydration can lower blood pressure and blood sugar levels, resulting in weakness, lightheadedness, and shaking.
The Role of Blood Sugar and Energy Levels
When you’re sick, your appetite often decreases. Skipping meals or eating very little can cause blood sugar levels to drop, especially if your body is using extra energy to fight infection. Low blood sugar may cause symptoms such as shakiness, sweating, dizziness, and feeling faint.
This is particularly common in people who:
- Haven’t eaten much due to nausea or sore throat
- Have been sick for several days
- Have diabetes or blood sugar regulation issues
Even mild drops in blood sugar can trigger that shaky feeling.
Stress Hormones and the Immune Response
Illness places stress on the body, prompting the release of stress hormones like adrenaline. These hormones help your body respond to infection but can also cause symptoms such as trembling, rapid heartbeat, and anxiety-like sensations. This “fight-or-flight” response is part of the immune system’s effort to protect you but can feel uncomfortable when it’s happening.
Medications That May Cause Shakiness
Certain over-the-counter and prescription medications commonly used during illness can contribute to shakiness. Decongestants, inhalers, and some cold and flu medications may stimulate the nervous system, leading to jittery or shaky feelings. Taking multiple medications or higher doses than recommended can increase these effects. If shakiness begins after starting a new medication, it may be a contributing factor.
When Shaking is Normal vs. When to be Concerned
Mild shakiness that improves with rest, fluids, and nutrition is often normal during illness. However, you should seek urgent care if shaking is:
- Severe or uncontrollable
- Accompanied by confusion or altered mental state
- Associate with high or persistent fever
- Occurring with chest pain or shortness of breath
- Paired with signs of dehydration you can’t manage at home
These symptoms may indicate a more serious condition that needs medical evaluation. If shakiness is mild, be sure to drink plenty of fluids, eat small balanced meals, rest and avoid overexertion, and avoid stimulants like caffeine.
Get Walk-In Illness Testing & Treatment at AFC Urgent Care Denver Park Hill
Feeling shaky when you’re sick is often a normal response to fever, dehydration, low blood sugar, or your body’s immune response. While it can be uncomfortable, it usually improves as you rest, hydrate, and recover. If shaking is severe, persistent, or accompanied by concerning symptoms, come visit the walk-in clinic at AFC Urgent Care Denver Park Hill. Our team can help identify the cause and ensure proper treatment for a safe recovery. We’re here to assess your symptoms, offer diagnostic testing if needed, and help guide you through the next steps. We accept most health insurance plans and offer competitive self-pay prices for vaccines. If you have questions, call us directly at (303) 639-1000.
