Hello there.
the vibration and weakness could be the b-complex vitamins deficiency along with deficiency of
calcium and
vitamin d3.
kindly ask her to take a tablet of neurobion forte everyday for a month and she will be fine.
she should drink lots of water, have lots of greens and fruits, sit in the sun for atlas half an hour during 10am -12 pm. don't give her glucose or any product with high glycemic index. rice, coconut etc have high glycemic index.
take her to a diabetologist if it doesn't improve.
Best regards.