What causes severe lower back pain after sleeping one night following a miscarriage?

Severe lower back pain occurring the night after a miscarriage may be caused by physiological reasons, or it could be related to pathological conditions such as incomplete abortion or uterine cavity infection. The underlying cause should be identified and treated accordingly. Specific analyses are as follows:

1. Physiological Causes

A miscarriage can lead to pelvic congestion and uterine contractions, which may result in varying degrees of lower back ache and abdominal pain. These symptoms usually subside with rest or heat application.

2. Pathological Causes

a. Incomplete Abortion

After a miscarriage, if there is a significant amount of retained tissue in the uterine cavity that fails to be completely expelled, it can stimulate uterine contractions and cause pain. This condition is typically accompanied by heavy vaginal bleeding and abdominal pain. Medications such as Yimucao Granules, Shenghua Decoction, or Xinshenghua Granules may be taken under medical guidance to promote uterine contractions and help expel residual tissue.

b. Uterine Cavity Infection

Infection of the uterine cavity may occur due to improper procedure during the abortion or inadequate postoperative care, allowing pathogens to enter and trigger inflammatory infection, which can also cause lower back pain. Anti-inflammatory treatment with medications such as Amoxicillin Capsules, Levofloxacin Capsules, or Metronidazole Tablets may be prescribed by a doctor.

Besides the above causes, severe lower back pain may also result from pelvic inflammatory disease, uterine fibroids, lumbar disc herniation, and other conditions. It is recommended to get adequate rest and promptly visit a hospital for proper diagnosis and treatment.