Hello, I am Dr Owen, I am a Board Certified Ob/Gyn Medical Doctor and I want to help you.
this is very normal - because given your age, you have less estrogen and this causes the skin in your labia/ vagina to thin, and hence this will cause blood vessels to be more prominent.
so this is NOTHING to be alarmed about.
I hope this helps
If you have have more questions please ask
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And yes, as your skin around your vaginal/ labia area thins, using irritating items such as a vibrator can cause the vessels to become more prominent.
I wish you well have a good evening.
Is there anything I can or should do?