What causes excessive sweating (night sweats or spontaneous sweating) during menstruation?

During menstruation, hormonal levels in the body may become unstable. Some women experience premenstrual syndrome (PMS), and others may even suffer from spontaneous sweating (night sweats or excessive perspiration unrelated to physical exertion or environmental heat). So, what causes spontaneous sweating during menstruation?

What Causes Spontaneous Sweating During Menstruation?

Spontaneous sweating during menstruation is often associated with a constitutionally deficient and cold body type in women. Combined with the natural depletion of qi and blood during menstruation—further weakening the body’s vital energy and blood—poor dietary habits may exacerbate fluid leakage. In such cases, it is recommended to consume Huangqi (Astragalus) decoction in moderation to tonify qi and nourish blood. Herbal formulas such as Sijunzi Tang (Four Gentlemen Decoction), Buzhong Yiqi Wan (Tonify the Spleen and Augment the Qi Pills), and Yupingfeng San (Jade Windscreen Powder) may also be used to alleviate symptoms. Additionally, emotional instability during menstruation—particularly liver qi stagnation transforming into fire—can likewise trigger spontaneous sweating. Maintaining a positive, relaxed mood during this period is advised, complemented by appropriate dietary therapy and herbal interventions.

The root cause of spontaneous sweating during menstruation is closely linked to deficiency of both qi and blood. Such deficiency commonly manifests as excessive drowsiness, insomnia with vivid dreams, menstrual irregularities (e.g., oligomenorrhea or amenorrhea), scanty menstrual flow, and the presence of clots. To support recovery, ensure adequate rest, avoid staying up late or prolonged sitting, and increase intake of foods rich in B-complex vitamins. Furthermore, sexual activity should be moderate, and strict attention must be paid to menstrual hygiene—including regular cleansing of the perineal area.

It is advisable to consume qi- and blood-tonifying foods during menstruation—such as red dates (jujubes) and goji berries—and to prioritize rest. Additionally, change sanitary pads or undergarments frequently during your period to keep the genital area clean and dry. We hope this information proves helpful to you!