What are the causes of my light menstrual flow?

My recent menstrual flows have been unusually light, with a dark, almost black color, and I occasionally experience abdominal pain. What could be causing my scanty menstruation?

What Causes Scanty Menstruation?

There are numerous potential causes of scanty menstruation (oligomenorrhea). Hormonal imbalances—particularly involving the endocrine system—can lead to reduced menstrual flow. Excessive dieting or weight loss may result in malnutrition or anemia, both of which can diminish menstrual volume. Clinically, scanty menstruation is defined as a total menstrual blood loss of less than 20 mL per cycle. A comprehensive evaluation is often required for accurate diagnosis. For instance, ovarian endocrine dysfunction—including conditions such as premature ovarian insufficiency (POI) and polycystic ovary syndrome (PCOS)—commonly manifests as reduced menstrual flow and delayed or irregular cycles.

Additionally, repeated surgical abortions may damage the basal layer of the endometrium, impairing its ability to regenerate. When the endometrium is excessively thin during menstruation, menstrual flow becomes lighter. Endometrial adhesions (Asherman’s syndrome) may also cause minimal shedding of the endometrium. If intrauterine adhesions are confirmed as the underlying cause of reduced menstrual flow, hysteroscopic adhesiolysis (surgical separation of adhesions) is typically indicated.

It is essential to undergo prompt and thorough diagnostic evaluation to identify the specific cause and initiate appropriate, targeted treatment. For hormonal imbalances, hormone therapy—such as sequential estrogen-progestin regimens—may be prescribed to regulate the menstrual cycle. In cases where malnutrition contributes to reduced flow, dietary optimization is key: incorporate nutrient-rich foods such as milk, lean meat, egg yolks, red dates (jujubes), and goji berries to support overall health and potentially improve menstrual volume. We hope this information proves helpful!