Increased frequency of blinking could be due to many causes ranging from dry eyes to benign essential blepharospasm. I suspect she also has drooping of upper eyelid.
Next Steps
Would be ideal to consult an Ophthalmologist trained in Oculoplasty who would be able to diagnose the entire range of disorders leading to the above symptoms. Treatment options are very effective in most patients.
Health Tips
While dry eyes can be managed with lubricating drops, BEB is subdued with Botox treatment. Droopy eyelid can be corrected by eyelid muscle reattachment.