Labial synechiae are an abnormal fusion of the edges of the labia surrounding the vaginal opening. Normally, the labia minora are not joined, but in this case they adhere to each other and may partially or completely block the vaginal opening.
Synechiae occur in 2–5% of girls aged six months to seven years. This condition usually resolves spontaneously during puberty and completely disappears after the first menstruation. It is transient in nature and is not classified as a pathology.
What are the causes of synechiae?
The most common hypothesis is that synechiae result from exposure to an irritant that alters the mucosal epithelium and triggers the process of re-epithelialization, forming an avascular connection between the labia.
This phenomenon is associated with a physiological deficiency of estrogen during childhood. The progressive disappearance of maternal estrogen after birth causes closure of the vaginal opening in predisposed girls.
The situation is aggravated by possible local inflammatory factors: poor hygiene, urinary retention, dermatitis, and diarrhea.
Excessive use of zinc-based healing pastes may also contribute to the formation of adhesions.
How do synechiae manifest themselves?
With partial fusion, there are no symptoms. In rare cases, when the synechiae are dense or complete, urinary retention may occur, increasing the risk of urinary tract infections. Pain in the genital area is rare. Sometimes older girls adopt unusual positions when urinating and may experience discomfort during physical exercise.
In rare cases, symptoms are acute and manifest as an inability to empty the bladder, urinary tract infections, pain, and local burning. If itching is present, a more thorough examination is necessary, as synechiae may be associated with lichen sclerosus, in which the mucous membrane of the genital organs appears thin and atrophic.
What should and shouldn’t parents do?
In many cases, no action is required if the synechiae do not cause discomfort. As practice shows, they often disappear earlier after the child stops wearing diapers. In other cases, in addition to more thorough cleansing, the use of local natural treatment methods may be appropriate. Good results can also be achieved with homeopathic treatment.
In more severe cases complicated by recurrent infections, local hormonal therapy with an estrogen cream may be recommended. It is not recommended to continue estrogen therapy for more than six weeks. In rare cases, hormone use may cause side effects such as irritation in the genital area, temporary darkening of the skin, and minor bleeding at the end of treatment. However, these symptoms are not serious, are short-lived, and resolve spontaneously.
What parents should definitely not do is try to separate the labia themselves. If your child has encountered this problem, make an appointment with a pediatric gynecologist at the Bogolyuby Medical Center. There is no need to be alarmed: surgical intervention is used only in cases where other developmental abnormalities of the genital organs are present. Only in cases of acute symptoms and dense synechiae may delicate manual separation under local anesthesia be required.
Prevention Guidelines
To prevent possible recurrences, thorough hygiene, the use of particularly gentle cleansing products, and avoiding prolonged retention of urine and stool in diapers are extremely important. Wet wipes should be used only occasionally, as they may cause local irritation. It is also recommended to avoid applying zinc oxide ointments, which are commonly used for diaper rash, to mucous membranes.
It is important to remember that fusion of the labia minora, even if it recurs repeatedly, is a benign condition and does not affect future sexual activity or fertility.
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