What Causes Blood Clots During Menstruation?

In daily life, many women notice blood clots during their menstrual period and become concerned about potential health abnormalities. So, what causes blood clots during menstruation?

What Causes Blood Clots During Menstruation?

During menstruation, the endometrium contains abundant fibrinogen. Enzymes present in menstrual blood break down this fibrinogen, preventing coagulation and keeping menstrual blood in a non-clotting state. Menstrual blood also contains fragments of endometrial tissue and mucus; thus, small clots may appear when menstrual flow is heavy. If the volume remains within the normal range and no other symptoms—such as abdominal pain—are present, no specific treatment is required. Avoid exposure to cold or catching a cold, and refrain from consuming frozen or “cold-natured” foods. Cold exposure can impair circulation, leading to blood stasis and dysmenorrhea.

If clots are large or if menorrhagia (excessively heavy menstrual bleeding) occurs, possible underlying causes include endocrine disorders, abnormal endometrial thickness, uterine fibroids, or an intrauterine device (IUD). In such cases, prompt medical evaluation and targeted treatment are essential. For clot formation secondary to excessive endometrial thickness, endometrial curettage may be performed to control bleeding. If uterine fibroids or an IUD are responsible, appropriate management—such as fibroid treatment or IUD removal—must be undertaken. Accurate diagnosis of the underlying cause is crucial before initiating any intervention.

Menstrual hygiene is paramount. Maintain external genital cleanliness throughout your period. Ensure adequate sleep and engage in moderate physical activity; gentle exercise promotes pelvic blood circulation, but avoid strenuous exertion. We hope this information proves helpful!