What is the white thing that looks like a layer of skin inside a woman's vagina?

Patient's question:

Sure, here is the translation of the content you provided:
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No
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Doctor's answer:

The vaginal mucosa refers to the mucus membrane layer secreted by the inner wall of the vagina, which keeps the vaginal inner wall surface moist and maintains its vitality. Due to its viscous surface, it is classified as mucosa. During the follicular phase, the vaginal mucosa is influenced by estrogen, leading to thickening of the epithelium and keratinization of the epidermal cells; the vaginal epithelial cells are rich in glycogen.