What does it mean when vaginal discharge is thick and sticky?

Leukorrhea refers to the vaginal discharge secreted by women, primarily composed of cervical mucus, transudate from the vaginal mucosa, and desquamated epithelial cells from the uterus and vagina. In healthy women, leukorrhea is typically white—sometimes transparent—and occasionally slightly viscous, but it should not have any unusual odor. So, what causes leukorrhea to become viscous? Below, we address this question.

What Causes Viscous Leukorrhea?

1. Ovulation Phase

The secretion of leukorrhea fluctuates in response to hormonal changes within the body. During puberty, estrogen secretion leads to cyclical variations in leukorrhea volume—sometimes abundant, sometimes scant. Around ovulation, leukorrhea becomes clear and more copious; at other times, it is less abundant and more viscous.

2. Cervical Inflammation

Chronic cervicitis or endocervicitis may cause the production of colorless, transparent, highly viscous leukorrhea resembling egg white—occasionally appearing cloudy. Aside from increased volume and viscosity, patients often exhibit no other symptoms. Therefore, if a woman notices an increase in leukorrhea volume or viscosity, she should promptly seek medical evaluation and treatment.

3. Vaginal Inflammation

In cases of vulvovaginal candidiasis, a white, membranous layer forms on the vulva and vaginal walls. After wiping away this layer, underlying erythematous and edematous mucosa is exposed, increasing susceptibility to secondary bacterial infection. Following onset, leukorrhea resembles cottage cheese, and patients commonly experience intense pruritus and severe pain in the vulvar region.

The above outlines the potential causes of viscous leukorrhea. We hope this information is helpful to you.