The good thing about drinking coffee at night is that it can relieve fatigue and improve work efficiency for a short period of time, and the bad thing is that it affects the human body's sleep, and is prone to insomnia, which is not conducive to the recovery of energy, and it is generally not recommended that patients drink coffee at night because drinking coffee at night may stimulate the patient's nervous system, leading to the cerebral cortex, the nervous system to find a state where the sensorimotor nervous system is activated, and the vagus nervous system is inhibited, so that the patient is mentally Hyperactivity, which leads to insomnia neurasthenia in patients