I m over 70 years old and have just begun to have strong tingling in my arm(s), especially my left arm, during the night. I m not sleeping on it wrong. Sometimes the right arm. I use my cell phone a lot and know it contributes to the problem, if not the cause of it. However, though I m getting something to hold it for me, I have tried not to strain my arms before bed, and I ve read that B-complex and magnesium help and my normal dosage can be increased. Is there any other advice, besides not holding the cell phone in the air?