For about 2 months, I often wake in the night and get a cold sensation in my lips, I suppose slightly tingly. It doesn't happen in the day, maybe occasionally the morning when I wake up and lasts a few minutes.
It's really causing me anxiety in the night. I've been taking folate acid recently as in the past I've been told I'm low.
Any idea what this could be as I'm not getting much luck online? Im 29 for reference.