Why does the body feel chills without a fever

Chills are a reaction of the body to several underlying causes, including low body temperature and cold weather, infections such as influenza, and other infections like pneumonia or urinary tract infections. They can also be associated with medical conditions such as hypothyroidism. Chills occur when the body's muscles contract rapidly in response to a drop in temperature or as a way to fight off infection, often accompanied by symptoms such as shivering, trembling, or teeth chattering. They help generate additional body heat, but in cases of severe hypothermia or excessive sweating combined with a fever, they may indicate serious health conditions that require immediate medical attention.

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