Does body temperature rise before menstruation?

Many young women report experiencing symptoms of premenstrual syndrome (PMS) as their menstrual period begins. These symptoms go beyond mood swings and include physical manifestations—sometimes even low-grade fever—leaving many puzzled. So, does body temperature rise before menstruation?

Does body temperature rise before menstruation?

Yes, body temperature may rise before menstruation. In women with highly regular menstrual cycles, basal body temperature typically increases about one week prior to the onset of menses. Basal body temperature (BBT) monitoring can help assess whether a corpus luteum has formed, whether ovulation has occurred, and whether the egg has been successfully released. After a mature egg ruptures from the ovary, it forms the corpus luteum, which secretes progesterone. This hormone causes a sustained rise in basal body temperature—typically by 0.3–0.5°C. As the corpus luteum remains active, body temperature stays elevated until menstruation begins. With the abrupt decline in both progesterone and estrogen levels at the end of the luteal phase, temperature returns to baseline. Therefore, if ovulation occurs before menstruation, basal body temperature should be approximately 0.3–0.5°C higher than it was immediately following the previous menstrual period.

During menstruation, avoid excessive physical exertion. Prolonged overexertion may disrupt endocrine balance, potentially leading to prolonged or delayed periods. Proper self-care is essential to maintain quality of life; adopt healthy lifestyle habits—otherwise, symptoms may worsen and significantly compromise overall health.

In daily life, maintain a balanced and disciplined diet. Avoid spicy, stimulating, or excessively rich foods, refrain from binge eating, and ensure adequate sleep—avoid staying up late. We hope this information proves helpful.