What could cause normal body temperature in the morning but over 37°C in the afternoon?
May 15, 2023
Source: Cainiu Health
Dr. Yang Shuwen
Introduction
Body temperature is normal in the morning but rises to over 37°C in the afternoon, which may be caused by conditions such as influenza, tonsillitis, or heatstroke. The specific analysis is as follows: Influenza is caused by the invasion of influenza viruses into the human body. Once the virus enters the body, the immune system immediately initiates a defense response, releasing various immune cells and molecules that act on the body's temperature regulation center, easily leading to fever.
Under normal circumstances, if body temperature is normal in the morning but rises above 37°C in the afternoon, it may be caused by conditions such as influenza, tonsillitis, or heatstroke. A detailed analysis is as follows:
1. Influenza
Influenza is caused by the invasion of influenza viruses into the human body. When the virus enters the body, the immune system immediately initiates a defense response, releasing various immune cells and molecules that act on the body's temperature regulation center, often leading to fever.
2. Tonsillitis
When the tonsils become infected, an inflammatory response occurs, releasing fever-inducing substances such as white blood cells and inflammatory mediators. These pyrogens can stimulate the body's temperature regulation center, resulting in elevated body temperature.
3. Heatstroke
During heatstroke, the body sweats excessively, leading to dehydration and electrolyte imbalance. Electrolytes and body fluids are essential components for maintaining normal thermoregulation; their loss may impair the body’s ability to regulate temperature, causing symptoms such as dizziness and fatigue.
Besides the common causes mentioned above, other possible causes include bronchitis, pneumonia, and hyperthyroidism. Patients should promptly seek medical attention at a hospital to identify the underlying cause and receive standardized treatment.
