Is uterine evacuation needed for a 6mm residual tissue?

Generally, a 6mm residual tissue after surgery does not require curettage if it is present only temporarily in the short term post-operation, without obvious bleeding or infection, and there are signs that the body is naturally expelling it. However, if the residue persists for a long time, is accompanied by bleeding or infection, or shows no response to medication, curettage may be necessary. If in doubt, it is recommended to seek medical advice promptly. Detailed analysis is as follows:

If a 6mm residue appears shortly after miscarriage or childbirth (e.g., within 1–2 weeks), and there are no symptoms such as persistent bleeding, abdominal pain, or fever, and ultrasound shows clearly defined borders of the residual tissue with minimal blood flow, along with gradually normalizing hormone levels, curettage is usually unnecessary. The body can naturally expel the residual tissue through uterine contractions. In such cases, following medical advice to take medications that promote uterine contraction and undergoing regular follow-up examinations are sufficient to monitor whether the residue resolves.

If the 6mm residue persists beyond two weeks, especially when associated with irregular vaginal bleeding, foul-smelling discharge, lower abdominal heaviness, or fever, or if follow-up imaging after drug treatment shows no significant reduction—or even an increase—in the size of the residue, curettage may be required. Prolonged retention increases the risk of intrauterine infection and endometrial adhesions, and may affect future menstruation and fertility. Timely curettage can prevent worsening complications and protect reproductive health.

After detecting a 6mm residue, regular follow-up ultrasounds and hormone level tests should be performed as directed by a physician to monitor changes in the residue. If abnormal symptoms occur or the residue fails to clear over time, prompt communication with a doctor is essential to determine the appropriate treatment plan.