Most of the head is smashed into no sequelae, but if the injury is serious, there may be obvious symptoms and leave serious sequelae, there may be limb movement, speech and other dysfunctions, the details are as follows:
1. Mild head injury: when the head is hit by an object, the brain tissue will be protected by the scalp, subcutaneous fat, muscle and skull. Most cases do not damage the brain tissue. If there is only a scalp injury or a skull injury, there is usually no obvious after-effects.
2. Heavy head injury: If the external force is too strong, which not only leads to scalp injury and skull bone injury, but also leads to brain tissue and nerve tissue injury, at this time there may be sequelae, mainly due to the destruction of nerve tissue. Some patients will have motor disorders of one side of the limbs, such as limping and weakness on one side/even bedridden for a long period of time, and they may also have slurred speech and deterioration of language function.