Bad stomach dizziness, mainly seen in the following aspects of the cause: First, hypotension: if after eating bad stomach frequent diarrhea, nausea, vomiting, etc., there is a short-term loss of fluid volume, if not timely replenishment of fluid volume, there will be a state of hypotension, the patient manifested as head dizziness, or have a headache, etc.. Second, intracranial infection: If the infectious diarrhea is caused after eating bad stomach, the patient will have fever, etc. The virus will easily invade the cranium, causing intracranial infection, and the patient will show vertigo and headache in the head, at this time, we should carry out routine blood and lumbar puncture examination, or through the cranial magnetic resonance imaging and enhancement examination to determine.