Dizziness and nausea are very common symptoms in clinical practice, resulting in dizziness, nausea and body weakness mainly due to the following reasons: 1. If the above symptoms are chronic and persistent, it may be a manifestation of anemia, which can be detected by routine blood tests. 2. 3, dizziness, nausea, body weakness should also be considered to be caused by internal environmental disorders, such as patients in the case of insufficient food or vomiting, dehydration caused by internal environmental disorders, will cause the patient to appear in the cerebral blood volume deficiency, and manifested as dizziness, nausea, body weakness problems.