What Deficiency Causes Skin Numbness? Understanding Nutritional Neuropathy
                                
                                
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                                    5 min read                                
                            
                                According to research from Harvard-affiliated Massachusetts General Hospital, a severe vitamin B12 deficiency caused a 62-year-old man to develop persistent skin numbness and a "pins and needles" sensation. While this specific deficiency is a primary culprit, several nutritional shortfalls can lead to such neurological symptoms.