A mild concussion can lead to drowsiness, and a concussion is a mild craniocerebral injury characterized by a brief history of coma immediately after the injury, ranging from a few minutes to no more than half an hour. And the patient will experience retrograde amnesia, which is the inability to recall what happened at the time of the injury after the injury. No intracranial hemorrhage is seen on cranial CT or cranial MRI, and no red blood cells are seen in the cerebrospinal fluid on lumbar puncture, but the patient will have headache, dizziness, nausea, vomiting, drowsiness, anxiety, insomnia, and other abnormalities. They appear more frequently in the early post-injury period, and patients control these symptoms by resting and taking medications if necessary.