What Are the Causes of Persistent Menstrual Bleeding?

Menstruation is a physiological cycle experienced by women. In daily life, many women exhibit abnormal symptoms during their menstrual periods. Prolonged or persistent menstrual bleeding—commonly described as “menstruation that never fully clears”—is a frequently encountered clinical issue. Some women dismiss it as insignificant; however, persistent incomplete menstruation is an abnormal condition requiring attention, as it often signals underlying health problems. Timely and appropriate interventions are essential to prevent disease progression and safeguard overall health.

What Causes Persistent Menstrual Bleeding?
1. Dysfunctional Uterine Bleeding (DUB)
This condition occurs in the absence of identifiable structural abnormalities but manifests as prolonged spotting or heavy bleeding. Clinically, it is characterized by significantly extended menstrual duration following onset—most cases lasting approximately 10 days, while some may persist for up to two months.
2. Uterine Fibroids
Fibroids located at different sites within the uterus produce varying symptoms. These may include prolonged menses and menorrhagia (excessively heavy menstrual flow), nocturia and urinary frequency, unexplained constipation, or even palpable abdominal masses.
3. Luteal Phase Deficiency
This refers to inadequate progesterone secretion by the corpus luteum after ovulation—or premature luteal regression—resulting in delayed endometrial development.
Patients commonly experience shortened menstrual cycles, recurrent miscarriage, or infertility.

4. Intrauterine Device (IUD) Effects
A six-month adaptation period typically follows IUD insertion. Mild lower abdominal discomfort during the first 3–6 months is considered normal. However, if lower abdominal heaviness, low back pain, abdominal pain, vaginal bleeding, or menstrual flow exceeding twice the usual volume persists beyond seven months, medical evaluation is warranted.
5. Medical Abortion
Pharmacological abortion disrupts the body’s natural hormonal balance, potentially leading to insufficient hormone secretion or hormonal dysregulation. Affected individuals may develop menstrual cycle irregularities, dysmenorrhea, coital pain, or decreased libido.
6. Other Contributing Factors
Beyond the above causes, environmental changes, excessive physical fatigue, or significant psychological stress can also contribute to persistent menstrual bleeding. Symptoms often improve markedly with self-regulation and lifestyle adjustments. Nevertheless, if prolonged bleeding persists, prompt medical consultation and treatment are strongly advised.