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Hi and thanks for the query,
It seems like she is suffering from persistent sexual arousal syndrome which presents with same symptoms as you described. There can be many causes for it one of them is irritation of sensory nerves. I would suggest she should visit a urogynecologist to have thorough examination and confirmation of diagnosis and treatment accordingly. Some sedatives and anesthetizing gels are used in the treatment.
Let me know if you have further questions.
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