Why does abdominal heat application after menstruation ends cause bleeding again, and what should be done?

Bleeding after applying heat to the abdomen following the end of menstruation may be caused by retained menstrual blood in the uterine cavity, hormonal fluctuations, endometritis, cervicitis, or dysfunctional uterine bleeding. This can be improved through observation and rest, lifestyle adjustments, or medication. If the bleeding is heavy, lasts a long time, or is accompanied by abdominal pain, prompt medical attention is necessary.

1. Retained Menstrual Blood in the Uterine Cavity: When menstruation has not completely cleared, heat application may promote uterine contractions and expel remaining menstrual blood. The bleeding is typically small in amount, dark red, and odorless. It is recommended to monitor the bleeding, avoid strenuous exercise, keep the abdomen warm, and no special treatment is usually needed—bleeding generally stops within 1–2 days.

2. Hormonal Fluctuations: Heat stimulation, recent sleep deprivation, or high stress levels can cause hormonal imbalances, leading to slight shedding of the endometrium and light bleeding, which is usually small in volume and bright red. It is advised to maintain regular sleep patterns, avoid staying up late, manage stress, and reduce intake of spicy and irritating foods.

3. Endometritis: Inflammation caused by bacterial infection of the endometrium may worsen with heat application due to increased congestion, resulting in bleeding accompanied by dull lower abdominal pain and increased foul-smelling discharge. It is recommended to take medications such as cefixime dispersible tablets, metronidazole tablets, or Gynecological Qianjin tablets under medical guidance to relieve symptoms.

4. Cervicitis: Congestion and swelling of the cervical mucosa may lead to vessel dilation and rupture after heat application, causing contact bleeding or light spotting, often accompanied by increased vaginal discharge. Patients may use medications such as Baofukang suppositories, Kangongyan tablets, or cefuroxime axetil tablets under medical supervision to alleviate discomfort.

5. Dysfunctional Uterine Bleeding: Irregular shedding of the endometrium due to hormonal regulation disorders may be triggered by heat application, resulting in variable bleeding volume and prolonged duration, possibly accompanied by dizziness and fatigue. Patients may follow medical advice to take medications such as estradiol valerate tablets, dydrogesterone tablets, or Gongxinning capsules to improve symptoms.

Maintain good genital hygiene and change underwear regularly. Avoid abdominal heat application during and around the menstrual period. Eat a light, balanced, and nutritious diet, maintain regular sleep habits, stay emotionally well-balanced, and minimize factors that may trigger bleeding.