Experiencing chills without an obvious cause—like being cold or having a fever—can be unsettling. Your body may be signaling that something is off internally. Here are some possible explanations:

1. Infections

Viral or bacterial infections (like the flu, urinary tract infection, or pneumonia) can trigger chills even before a fever develops.

Your body shivers to raise its core temperature and fight off pathogens.

2. Blood Sugar Fluctuations

Low blood sugar (hypoglycemia) can cause shaking, chills, and sweating.

Common in people who skip meals, over-exercise, or have diabetes.

3. Thyroid Issues

Hypothyroidism (underactive thyroid) slows metabolism, making it harder for your body to regulate temperature.

Can lead to feeling unusually cold and experiencing unexplained chills.

4. Anemia

Low red blood cell count reduces oxygen delivery to tissues.

Chills, fatigue, and paleness are common symptoms.

5. Hormonal Changes