Why Does Body Temperature Fluctuate, Rising and Falling?

A fluctuating body temperature may be attributed to endocrine disorders that impair thyroid function, damage to the brain's central temperature regulation system, or infectious diseases within the body, all of which can significantly harm physical health. Consequently, whenever body temperature fluctuates, it is crucial to seek medical attention promptly to determine the underlying cause and receive targeted treatment, thereby preventing the emergence of new health issues stemming from incorrect treatment approaches.

1. Endocrine Disorders

The most prevalent factor is endocrine disorders, particularly those affecting the thyroid gland. Hyperactivity of the thyroid gland leads to an increase in body temperature, whereas hypothyroidism results in a decrease. Thus, thyroid dysfunction can directly cause fluctuations in body temperature.

2. Damage to the Brain's Central Temperature Regulation System

Severe impacts or injuries to the hypothalamus, including acute brain trauma, acute cerebral hemorrhage, stroke, cerebral infarction, and cerebral embolism, can impair the hypothalamus's temperature sensation center, ultimately leading to fluctuations in body temperature.

3. Infectious Diseases

Infectious diseases, such as inflammation, can trigger the recurrent production of pyrogens within the body. The body's response to these pyrogens can cause fluctuations in body temperature.