Shivering But No Fever: Here Are 7 Causes and How to Treat Them

Illustration of causes and how to deal with shivering but not fever (Freepik/stockking)

YOGYAKARTA – It feels strange when your body is shaking and your skin is crawling, but the thermometer shows a normal temperature. This condition is called chills without fever, which can be caused by many things. According to Dr. Erin Nance, an internist, as reported by Health on Wednesday, November 12, shivering is the body's way of stabilizing its temperature when there is an imbalance between internal and external temperatures. So, while not always a sign of a fever, shivering can be a signal that the body is adapting to something.

1. Exposure to cold air

The most common cause of shivering without a fever is an ambient temperature that is too low. When the air is cold, the body attempts to conserve heat by rapidly contracting muscles, causing shivering. This is the body's natural mechanism to maintain a stable core temperature. If left untreated for too long, it can lead to hypothermia. So, dress warmly and seek a warmer place immediately if you start to shiver.

2. Low blood sugar (hypoglycemia)

When blood sugar levels drop, the body lacks the energy to maintain normal functions. As a result, the nervous system triggers reactions such as shivering, cold sweats, and trembling. People with diabetes or those who frequently delay meals are at higher risk of experiencing this. Try consuming sweet foods like fruit, bread, or warm tea to stabilize blood sugar levels, and avoid leaving your stomach empty for too long.

Illustration of the causes and how to deal with shivering but no fever (Freepik/benzoix)

3. Stress or anxiety

Severe stress or a panic attack can trigger a physiological reaction such as shivering without a fever. When adrenaline increases, muscles tense and the body feels cold. You may also experience rapid breathing and a pounding heart. Dr. Nance explains that the adrenaline released by the body during stress can alter blood flow and affect body temperature. To cope, take slow breaths, sit quietly, and try relaxation techniques such as meditation or listening to soothing music.

4. Heavy physical activity

After intense exercise, the body loses a lot of fluids and energy. When cooling down, body temperature can drop more quickly than usual, triggering shivering even when you don't have a fever. This is common if you sweat profusely and are immediately exposed to wind or air conditioning. The solution is simple: cool down gradually, change out of wet clothes and change into dry, comfortable ones, and drink enough water to rebalance your body temperature.

5. Mild infection or early fever

Sometimes chills appear as an early sign that the body is fighting an infection, even before a fever rises. This could be due to a mild cold, urinary tract infection, or sinusitis. The body begins mobilizing its immune system to fight the germs, causing muscles to contract, generating additional heat. If a fever, aches, or a stuffy nose develop a few hours later, this is likely an early sign of illness. If your condition persists, seek medical attention immediately to determine the exact cause.

Illustration of cause and how to overcome shivering without fever (Freepik)

6. Side effects of medications or medical conditions

Some medications, such as antibiotics or antidepressants, can cause side effects such as shivering without fever. Additionally, conditions such as anemia, thyroid disorders, or autoimmune diseases can also trigger similar symptoms. In her explanation, Nance emphasized, "If shivering occurs frequently for no apparent reason, it's a sign you need a medical evaluation." Therefore, don't hesitate to consult a doctor to determine the exact cause.

7. Dehydration or malnutrition

A lack of fluids or electrolytes impairs blood circulation and makes it difficult to regulate body temperature. As a result, the body can react by shivering. This often occurs in people who are so busy that they forget to drink or eat. Ensure you are adequately hydrated and consume nutritious foods to maintain a normal metabolism and a balanced body temperature.

How to deal with shivering without fever

The first step is to immediately warm your body with a blanket, thick clothing, or a warm drink. Second, eat or drink something to balance your blood sugar levels. Third, get enough rest and avoid severe stress. If shivering is accompanied by other symptoms such as chest pain, confusion, or persists, consult a doctor immediately for further evaluation.

Shivering without a fever can be a subtle signal from your body that needs attention. Sometimes it's simply due to cold air, but it could also be due to low blood sugar or stress. By understanding the causes and how to treat them, you can respond more quickly and maintain your body's comfort. Don't ignore recurring symptoms, as your body is always giving you signs; it's up to you whether you listen or not.