Waking Up with a Numb Hand: What It Could Mean December 27, 2025 by Hamza ADVERTISEMENT Vitamin Deficiencies or Diabetes 5 . Vitamin Deficiencies or Diabetes Deficiency in vitamins like B12, or nerve damage caused by diabetes (neuropathy), may cause tingling and numbness in If you experience numbness in other parts of the body, which could indicate a more serious neurological issue. ADVERTISEMENT ←PreviousNext→