Sleeping with a hot body can be caused by autonomic disorders, alcohol consumption, and high indoor temperatures. 1. Autonomic disorders are generally caused by long-term mental tension, excessive psychological pressure; or emotional depression, anxiety, resulting in the body’s autonomic nervous system dysregulation. Since the autonomic nerve can regulate the body’s vasodilation and energy metabolism, it can trigger the phenomenon of vasodilation and body heat during sleep. 2. If you drink alcohol before going to bed, you will speed up the blood circulation in your body, and due to the dilation of blood vessels, you will also feel hot during sleep. 3. If the room temperature in the house is too high and the bedding is too thick, you may also feel hot while sleeping. Patients with symptoms of body heat while sleeping should pay attention to rest, and if this situation occurs frequently, they should consult a doctor in time and follow the doctor’s instructions for examination and treatment.