The main causes of dizziness, headache and weakness in patients are the following: 1. It may be caused by problems of a debilitating nature of neurological function, this type of patients are prone to dizziness, headache and headache when they stay up late, do not sleep well and have low sleep quality, the patients are depressed and relatively weak; 2. Patients with headache, dizziness and weakness should consider that they may be caused by cerebrovascular diseases, such as elevated blood pressure Or caused by insufficient blood supply to the brain, cerebral arteriosclerosis and other reasons, can be clarified by doing the relevant examination of transcranial Doppler; 3, if the patient has headache, dizziness and weakness during the cold and fever, it is related to the bacteria or toxins secreted by the virus, this situation is mainly for the cold to symptomatic treatment.