If the cerebral nerve injury is small, treated promptly, and rehabilitation intervenes early, it is possible to recover within three months, on the contrary, it will take six months or even longer. There are many causes of cerebral nerve injury, such as cerebral hemorrhage, cerebral hypoxia and ischemia, and brain infection. If it is caused by lack of oxygen and ischemia in the brain, it is possible to recover within three months if the condition is mild and treated in time. Traumatic brain injury, infection caused by brain nerve damage, according to the degree of trauma, infection area size, the corresponding recovery time is different. Stroke needs to be judged according to the degree of nerve damage. Brain nerve damage is categorized into demyelination, neuronal damage, axonal degeneration and other types. If it is a demyelinating nerve injury, then the possibility of healing is very high, and recovery is possible within six months after treatment with medication. However, if the damage is neuronal or axonal degeneration, it will take longer. If the degree of brain nerve damage is too severe, it will take more than half a year or even longer, and will be accompanied by serious sequelae, and may not recover for the rest of your life. On the contrary, if the damage is mild and there are no or only minor complications, it is possible to recover within six months with timely treatment. After the occurrence of brain nerve injury, if you can go to the regular hospital in time for treatment and insist on exercise and rehabilitation, then the recovery time of brain nerve injury will be shortened, on the contrary, if you do not have timely treatment and do not make efforts to cooperate with the rehabilitation training, then the recovery time of brain nerve injury will be prolonged, or even will not be recovered forever.