Patients with headache, dizziness, brain swelling and weakness may be caused by lack of sleep and rest, or they may have cerebrovascular diseases or systemic diseases such as poisoning and anemia. and cause dizziness, headache, brain swelling and weakness; 2, cerebrovascular disease: common are vertebrobasilar artery system ischemia, posterior circulation transient cerebral ischemia and cerebral infarction, vertebrobasilar artery disease, vertebrobasilar artery thrombosis, etc. cause headache, dizziness and other symptoms; 3, cardiac insufficiency: patients with cardiac insufficiency will experience nocturnal wheezing and other phenomena because of insufficient circulating blood supply, which can lead to dizziness, headache and other Symptoms; 4, poisoning, infection, anemia, etc.: Patients will be poisoned, infected, anemia resulting in a decrease in oxygen content in the blood, causing insufficient oxygen supply to the brain; 5, hyperthermia heat stroke: in high temperature, high humidity, strong heat radiation environment, the patient’s body has too much heat and reduced heat dissipation, resulting in the body’s internal temperature to rise, presenting the state of disease, headache, dizziness, head swelling, weakness and other states; 6, abnormal blood pressure : Whether it is hypertension or hypotension, patients will experience blackness, dizziness, headache, weakness of limbs, etc. Serious patients even experience syncope or shock and other symptoms; 7. Hypoglycemia: When the fasting blood glucose concentration is lower than 2.8 mmol/L, the sympathetic nerve of patients is excited and brain cells are deprived of oxygen, presenting symptoms such as dizziness, headache, panic and general weakness; 8. Psychological diseases: such as depression, anxiety disorders, these psychological disorders can cause some mental symptoms and also somatic symptoms. The physical symptoms are typically headache, dizziness, brain swelling, and weakness. In addition, diseases such as upper respiratory tract infection, migraine, and neurasthenia can also cause headache, dizziness, brain swelling, and weakness. Patients are advised to go to the hospital to identify the cause when symptoms appear and then treat the symptoms.