I saw this report in the news the other day, a 9 year old girl was knocked down by a classmate on her way to gym class, the girl died in the afternoon at school and donated 7 organs, while this act is commendable, it has to be said that this is an outright tragedy. The girl was knocked down by a classmate on her way to gym class at about 11:00 p.m. After the collision, there was a brief coma, and then the teacher helped the child to the office and recovered for a while. After that, the child was sent to gym class again, went home for lunch, and became nauseous and comatose around 2:00 p.m. when he went to school in the afternoon. When the parents arrived at school, the child had already passed away. For this accident, in fact, the golden four hours of which were completely wasted. There was a lot that the parents and teachers could have done, or could have salvaged, but due to a lack of common medical knowledge, the child just lost his life. The brain is simply the skull wrapped around the cranium, of which the soft tissue of the cranium is very fragile. If you have friends who watch boxing matches, you will find that KO is a punch to the brain people instantly produce a concussion, thus appearing to faint, the person immediately collapsed. If in life, fell to the temporal or back of the head, this time must pay attention to the back of the head once the damage will be damaged very badly. The brain is very fragile like tofu and bleeds very easily. If the bleeding reaches a certain amount, it will produce an increase in cranial pressure. The bone is very thin and it is easy to transmit the force into the brain and thus the damage occurs. The brain is connected to the body with only one exit, at the back of the head where it meets the cervical vertebrae of the spine, and its location has an opening in which are the nerves, with the brain stem inside. At this time, if the brain pressure increases and compresses the brainstem, brain herniation will form, after which there may be cardiac arrest, respiratory arrest, etc., which is a more critical state. After a fall, there is a gradual process of fainting and syncope, even if there is no fainting, if the fall is particularly painful, or very uncomfortable body conditions need to be noted. If there is bleeding, it can lead to increased brain pressure, headache and dizziness, vomiting and nausea, you must go to the hospital in a timely manner. Some children may be naughty and do not talk to their parents even when they have symptoms of dizziness and headache. When the symptoms of vomiting appear, the brain pressure is already very high and they may pass out at any time, causing the need to call 120 for emergency treatment in a timely manner. If there is jet vomiting, you need to be very careful, this is an important indication of increased cranial pressure. If there are people around who know about medicine, they can also look at the pupils to see if they are round and equal in size, and if there is a light reflex to make a preliminary judgment. I hope that parents and school teachers must raise awareness of the risks and usually learn some knowledge about life first aid, so that they may be able to avoid a bloody lesson.