What are Chills?

Chills are a common physical symptom associated with an array of illnesses or emotions. They are characterized by a sensation of coldness or a sudden wave of shivering that can come and go quickly. The scientific term for these chills is “rigors,” which is defined as an episode of shaking that is accompanied by a fever or associated with a medical disorder.

Chills can be caused by a variety of things ranging from feeling a bit under the weather or being exposed to cold temperatures. Most often, they are a sign of an underlying medical issue such as a virus, infection, or illness.

What Causes Chills?

Chills can be caused by many triggers, including but not limited to:

• Viral infections such as the cold and flu

• Bacterial infections such as strep throat or urinary tract infections

• Parasitic infections, such as malaria or giardiasis

• Certain medications, such as antibiotics or chemotherapy drugs

• Emotional stress or anxiety

• Adrenaline rush

• Severe allergic reaction

• Cold temperatures

• Certain hormonal changes or imbalances

• Excessive alcohol consumption

• Certain neurological or endocrine system disorders

• Low blood sugar

What are the Symptoms of Chills?

The most common symptom of chills is a sudden feeling of coldness accompanied by shivering or trembling. People may also experience a fever, muscle aches, fatigue, nausea, and problems concentrating. If the underlying cause is a viral or bacterial infection, additional symptoms such as a sore throat or congestion may present themselves. In some cases, the symptoms of chills may be accompanied by a rash, swollen lymph nodes, or other skin irritations.

If an individual is experiencing chills that are especially severe and/or persistent, they should consult with a medical professional to rule out any underlying health concerns. Depending on the cause, a medical professional may prescribe antibiotics, anti-fungal medications, or anti-viral treatments to reduce symptoms and speed up recovery.