Hi, sometimes I felt like numbness in hands and legs if I sit in some positions especially for hands when leaned back and take support of my elbows on bed while using mobile. Also some times I am seeing my muscles are moving unintentionally and some times my eyebrows are moving un intentionally is this normal? Sometimes I felt like my fingers are shaking if I feel stress and after heavy weight lifting. In past also feel leg cramps, but not in recent times. Are these symptoms normal?  Please provide guidance.