There are many reasons for confusion and weakness in the head: 1. Consider cerebrovascular disease, when patients due to some reasons lead to insufficient blood supply to the brain, cerebrovascular spasm, there will be confusion and weakness in the head, which can seriously lead to nausea, vomiting, visual rotation or numbness and weakness of the limbs. 2. 3, the patient’s confused head and weak body may be the result of lack of sleep, low sleep quality, staying up late, overuse of the brain and other reasons, causing the performance of brain nerve dysfunction, which can be completely improved after rest.