Good afternoon. I am 39 years old, female, for about a year I have had sharp twinges of pain in my arms and legs, feels like a needle poking me. it happens usually right before I fall asleep. feels almost like something is biting me and I have to rub it or scratch it for it to go away. The pain is not at a specific spot but seems to be usually on my arms and legs, sometimes other parts of my body. What might this be? Thank you, Katie