What Causes Cervical Erosion?
Cervical ectropion is a normal physiological phenomenon—referring to the outward displacement of columnar epithelium from the cervical canal to the external os of the cervix under the influence of estrogen. Most patients are asymptomatic; symptoms resembling those of cervicitis—such as abnormal vaginal discharge, lower abdominal pain, or postcoital bleeding—typically arise only when infection or other irritants are present. So, what causes cervical ectropion? Below, we address this question.

Causes of Cervical Ectropion
1. Congenital Factors
Clinical experts indicate that some women are born with cervical ectropion. During fetal development, maternal estrogen exposure causes the squamous epithelium of the cervix to be replaced by columnar epithelium, resulting in a reddish appearance of the cervical surface. This condition persists over time and thus constitutes congenital cervical ectropion. Congenital ectropion may spontaneously resolve due to squamous metaplasia, or it may persist chronically if complicated by bacterial infection.

2. Over-Cleansing
Excessive vaginal cleansing can disrupt both the vaginal pH balance and the natural microbial flora. Under normal conditions, the vagina maintains a mildly acidic environment (pH ~3.8–4.5), which supports a healthy balance of lactobacilli—beneficial bacteria that inhibit pathogenic organisms. Disruption of this acidic environment promotes proliferation of harmful bacteria, potentially leading to cervical ectropion. Additionally, women are advised to use reliable contraception during sexual activity and avoid frequent induced abortions.

3. Unhygienic Sexual Practices
Inappropriate sexual behavior can contribute to cervical ectropion. “Inappropriate” here encompasses two main aspects: First, unhygienic sex—particularly having multiple sexual partners—increases the risk of exposure to infectious pathogens. Second, overly vigorous or excessively frequent intercourse may physically damage the cervix, predisposing it to ectropion. Furthermore, repeated induced abortions can cause varying degrees of cervical trauma, potentially triggering cervical ectropion.
The above outlines the primary causes of cervical ectropion. We hope this information is helpful to you.