What are dizziness, vomiting and fever? Dizziness, vomiting, and fever are mainly due to the following two reasons: First, when we have an acute infection, such as an infection of the upper respiratory tract or other parts of the body, it can be accompanied by fever, increased body temperature, dizziness, nausea, and vomiting, and at this time we can do routine blood tests to find out if there is an increase in the ratio of white blood cells and neutrophils. After we give anti-infection or heat treatment, the patient’s dizziness and vomiting symptoms can be relieved. Second, dizziness, vomiting, and fever, we should consider whether the patient may have intracranial infection, and ask whether the patient has headache or seizure, and at this time we need to do cranial magnetic resonance imaging with enhancement and lumbar puncture to find out whether the protein of cerebrospinal fluid is increased and whether the cell count is increased. If the dizziness, vomiting, and fever are caused by intracranial infection, we will give anti-inflammatory and antiviral treatment mainly for the viral infection.