In shallow coma, also known as semi-coma, the patient loses consciousness, does not respond to the surrounding sound and light, sometimes has purposeless limb dancing or talking nonsense, when pressing the upper edge of the eyes with the hand, the patient has a painful expression or uses the hand to resist, breathing, pulse and blood pressure generally have no obvious changes; urine and stool are mostly retained, and a few patients are incontinent. In deep coma, there is complete loss of consciousness, no response to various stimuli, no movement, and irregular breathing, decreased blood pressure, and incontinence of urine and stool. How to check for shallow coma? For comatose patients, the examination should be focused due to uncooperative examination, which includes: 1) body temperature, pulse, respiratory rate and depth, respiratory odor and respiratory secretions; 2) blood pressure; 3) skin cyanosis, hemorrhage and sweating; 4) degree of coma; 5) pupil size, whether the two sides are equal in size and response to light; 6) eye activity and oculocerebral reflex; 7) whether there is optic papillary edema and hemorrhage in the fundus of the eye and 8. motor and reflexes; 9. meningeal stimulation signs; 10. electroencephalography, CT examination, etc.