What causes light red bleeding during sexual intercourse after having an IUD inserted?

Light pink bleeding after sexual intercourse following IUD insertion may be caused by initial irritation from the IUD, improper sexual activity, cervicitis, endometritis, or vaginitis. This can be improved by adjusting sexual practices, maintaining hygiene, and medical treatment. If bleeding occurs frequently or is accompanied by pain or abnormal discharge, prompt medical attention is necessary.

1. Initial irritation after IUD insertion: After IUD placement, the uterus needs time to adapt to the device. Sexual intercourse in the short term may stimulate uterine contractions, leading to slight endometrial bleeding. It is recommended to avoid sexual intercourse for 1–2 weeks after IUD insertion and resume only after the uterus has adapted, thereby reducing irritation.

2. Improper sexual activity: Excessively vigorous or frequent sexual intercourse may damage the cervical or vaginal mucosa, causing minor bleeding. It is advised to control the intensity and frequency of intercourse, use gentle movements, and avoid excessive stimulation.

3. Cervicitis: Bacterial infection causing inflammation of the cervix makes the cervical mucosa fragile, leading to bleeding after sexual contact, often accompanied by increased discharge. Under a doctor's guidance, medications such as cefixime dispersible tablets, metronidazole suppositories, or Baofu Kang suppositories may be used to relieve symptoms.

4. Endometritis: Bacterial invasion of the endometrium due to IUD insertion procedure or poor hygiene can cause inflammation. Sexual activity may aggravate bleeding, often accompanied by lower abdominal heaviness or discomfort. Under medical supervision, medications such as levofloxacin capsules, Gynecological Qianjin tablets, or cefuroxime axetil tablets may be used to improve symptoms.

5. Vaginitis: Infection of the vagina by pathogens causes inflammation, with mucosal congestion and swelling. Friction during intercourse may lead to mucosal damage and bleeding, accompanied by itching and foul-smelling discharge. Follow medical advice to use clotrimazole suppositories, metronidazole vaginal effervescent tablets, or nystatin suppositories to alleviate symptoms.

Maintain external genital hygiene, change underwear regularly, practice good hygiene for both partners before and after sexual intercourse, avoid tub baths and opt for showers, eat a light diet avoiding spicy foods, and support healthy recovery of the reproductive system.