Hello, can anyone tell me what are causes of the aching, tingling, numbness, and itching in my hands and arms? I am 26 years old male. it has been years since I am experiencing numbness, tingling, and aching in my left hand. I tried to consult a doctor he said it might be because of the cold weather. I still don't get it. Please help. What are the causes of aching, tingling, numbness, and itching in hands and arms?