I'm just seeing how common this is. The only other person I've seen mention this symptom is my sister (and me).
It's like an achy, electrical shock type feeling, and a chill in the bones (fluey feeling) just in the lower portion of the body. It kept me awake for 2 nights and paracetamol didn't touch it. Anyone else?! And WHY does it happen? I honestly didn't expect butt cheek and leg pain. Bizarre.