My son wakes up complaining his feet are hot?

My 5 year old son comes to my bed every morning usually. He comes to our bed and falls right back to sleep. For the past week or so he wakes up screaming that his feet are hot. They are not hot to the touch and I’m not sure what to do. He wakes up kicking his feet and has my husband turn the fan on and then all is well after a few minutes. Has anyone else experienced anything like this? I’m not sure what to do or how to help or if this is something to be worried about.

As an adult i was having the same problem. My doctor said it was a vitamin b12 deficiency