Here's how it works:
* Temperature Drop: When your body senses a drop in temperature, the hypothalamus sends signals to the muscles to contract rapidly.
* Muscle Contractions: The rapid muscle contractions generate heat.
* Increased Blood Flow: The increased blood flow from the contracting muscles helps to circulate the generated heat throughout the body.
Shivers can be caused by various factors, including:
* Cold temperatures: This is the most common cause of shivers.
* Fever: Shivers can occur at the onset of a fever as the body tries to raise its temperature.
* Hypoglycemia: Low blood sugar can trigger shivers.
* Medical conditions: Certain medical conditions like hypothyroidism or sepsis can also cause shivering.
* Emotional distress: Stress or fear can sometimes lead to shivers.
Shivers can be a sign of a serious health issue if they persist or occur alongside other symptoms. If you experience persistent or unexplained shivers, it's important to consult a doctor to rule out any underlying medical conditions.