What should I do if my body repeatedly experiences fever and chills?

Fever, also known as pyrexia, refers to an elevated body temperature. Recurrent episodes of fever and chills may be caused by intense physical exercise, the menstrual period in women, malaria, pyelonephritis, sepsis, or other conditions. Symptomatic management through general care and medication is usually required. If discomfort occurs, it is advisable to seek medical attention promptly and receive appropriate treatment under a doctor's guidance. The specific causes are analyzed as follows:

1. Intense physical exercise: After vigorous exercise, the body produces more heat and blood vessels on the skin surface dilate to facilitate heat dissipation. If one suddenly enters a cold environment—for example, moving from a hot gym to an air-conditioned outdoor area—the rapid loss of body heat can cause a sensation of coldness. It is recommended that after intense exercise, individuals avoid immediately entering environments with large temperature differences. Instead, remain in a transitional area for a while to allow the body time to adjust.

2. Menstrual period in women: During menstruation, hormonal fluctuations in women can affect the body's thermoregulatory center. When the ambient temperature drops, the body may experience chills, followed by brief episodes of fever due to self-regulation, leading to alternating fever and chills. Applying a hot water bottle or using a warming pad may help maintain body warmth; however, care should be taken to avoid burns.

3. Malaria: Malaria is caused by infection with Plasmodium parasites. These parasites live and multiply inside red blood cells, and their life cycle leads to periodic rupture of the red blood cells. When the cells burst, they release large amounts of parasite metabolic byproducts and toxins, which stimulate the immune system and trigger fever. Prior to the onset of fever, patients often experience chills and shivering. Under medical supervision, patients may be treated with medications such as artesunate tablets, chloroquine phosphate tablets, or mefloquine hydrochloride tablets.

4. Pyelonephritis: This condition is primarily caused by bacterial infections, commonly Escherichia coli ascending to infect the renal pelvis and kidney tissue. Inflammatory stimulation triggers fever, which is the body’s defensive response to bacterial invasion. Chills occur because bacterial toxins and inflammatory mediators affect the thermoregulatory center, causing shivering before fever develops. It is recommended to take medications such as minocycline hydrochloride capsules, cefixime granules, or cefuroxime axetil granules as directed by a physician to alleviate symptoms.

5. Sepsis: Sepsis is a systemic infection caused by pathogens such as bacteria or fungi entering the bloodstream, multiplying within it, and releasing toxins. These toxins activate the immune system, triggering an inflammatory response that results in fever. The pathogens and their toxins disrupt the body's thermoregulatory center, leading to chills and a sensation of coldness. Treatment should be conducted under medical supervision using medications such as minocycline hydrochloride capsules, tinidazole capsules, or cefoxitin sodium for injection.

In daily life, if fever or chills occur, adjusting room temperature, wearing suitable clothing, or covering with blankets can help maintain comfort. Adequate rest and relaxation can reduce physical stress and support normal temperature regulation.