You’re too hot
Lower the temperature of your bedroom before you climb into bed, says Dr. Wang-Cheng. Lower temperatures tell your body it’s time to sleep. If your bed partner objects, just tell him or her to bundle up.
Also, try sleeping naked. It’s easier to adjust your comfort zone with sheets and blankets you can pull up or throw off rather than a long nightgown or a pair of fleece pajamas, says neurologist Dr. Charles J. Bae, a sleep specialist at the Cleveland Clinic Sleep Disorders Center.