What is the reason for feeling cold in feet while sleeping.

See below: One reason is that during sleep, metabolism slows and so does core body temperature. Thus extremities, such as the feet and hands, may feel colder when awakening in the night from sleep. If you wake up from it often, you can wear socks or cover them up with a blanket to optimize your sleep quality. But if you notice other symptoms, such as numbness or burning in the feet, see a neurologist.