Ask a Neurologist. Get Answers to Your Neurology Questions.
Hello I'm Dr Palmer. Do you have diabetes? Pins and needles usually is a nerve problem. Sometimes anxiety can poor thyroid function or vitamin defiencies/alcohol can do this but so can back injuries. But if it has not progressed, then it is probably nothing to worry about. Also medications like Gabapentin or Lyrica can help with those symptoms. It can occur on both sides. It would be the cause of your discomfort, but as long as you can urinate okay, no numbness on the inner thighs, no stool incontinence then nothing to worry about as far at the spinal cord goes.
The fact that the sensation improves with activity, this may be the back. Perhaps some physical therapy, or yoga can help with this problem. I hope I was able to help. Let me know if you have further questions.
I would cut out the alcohol for at least a week and see what happens. Also, anxiety at night can cause this. But if it gets better with movement during the day, and has not progressed during the year, then it may be coming from your back, but typically you would get shooting pain. I do not think it is anything to worry about. The alcohol is a very common cause though.