Causes of Scanty Menstruation

Hypomenorrhea refers to a condition in which the menstrual cycle remains essentially normal, yet menstrual flow is significantly reduced—sometimes amounting to only scant spotting that ceases almost immediately. It is classified as a menstrual disorder. Hypomenorrhea frequently co-occurs with delayed menstruation (oligomenorrhea) and is often accompanied by weight gain. In adolescents and women of childbearing age, this condition may progress to amenorrhea; in perimenopausal women, it often heralds the onset of menopause. So, what are the underlying causes of hypomenorrhea? The following section addresses this question.

Causes of Hypomenorrhea

1. Polycystic Ovary Syndrome (PCOS)

Reduced menstrual flow is a common symptom of polycystic ovary syndrome (PCOS), a gynecological endocrine disorder frequently associated with hormonal imbalances. When estrogen levels are abnormally low, the endometrium fails to proliferate adequately, resulting in endometrial thinning and consequently diminished menstrual flow. Additionally, PCOS commonly manifests with ovulatory dysfunction.

2. Hyperprolactinemia

Hyperprolactinemia can lead to hypomenorrhea and may also cause amenorrhea. It is a syndrome characterized by elevated prolactin levels, amenorrhea, galactorrhea, anovulation, and infertility—triggered by internal or external environmental factors. Normal pulsatile secretion and circadian rhythm of prolactin play critical regulatory roles in mammary gland development, lactation, and ovarian function.

3. Endometrial Tuberculosis

Endometrial tuberculosis most commonly presents with hypomenorrhea. It is an inflammatory condition of the endometrium caused by Mycobacterium tuberculosis. Genital tuberculosis in women typically first affects the fallopian tubes before progressively involving the endometrium and ovaries. Besides causing reduced menstrual flow, endometrial tuberculosis may also result in infertility and lower abdominal heaviness or pain. Moreover, direct endometrial injury—such as that caused by repeated induced abortions or multiple curettages—can similarly damage the endometrium and lead to hypomenorrhea.

The above outlines the primary causes of hypomenorrhea. Patients are advised to maintain adequate warmth, consume foods rich in vitamins C and E to promote pelvic blood circulation, and avoid staying up late—especially during menstruation. We hope this information proves helpful.