Hi, my mother sometimes feels Tingling and numbness in her arm while she is asleep in night. She complains that no matter how much she tries to ignore the pain,she has wake up and sit for atleast 10 mins for pain to vanish. It is not like she observes this every night however frequency of this behaviour increases in winter season. We have consulted doctors in our locality and she feels ok till the time she keep going with the prescribed medication. However, no one has actually told that what is disease is this? Kindly suggest what kind of specialist should we consult to diagnose this?