Medically reviewed by Erika Prouty, PharmD B12 deficiency can cause increased sensitivity to cold due to its link with anemia ...

It happens more often than you realize. You’re drifting off into sleep, but suddenly, you feel an unexplained chill. You grab for another blanket, pull your hoodie tighter or tuck your feet in deeper.

Scientists say just seeing other people be chilly can cause you to be cold as well. Our bodies adjust our core temperature based on the surrounding environment, but that core temperature can also be ...