There are many causes of dizziness, nausea, vomiting, and general weakness, which should be analyzed in conjunction with the patient’s form of onset, triggers, and symptoms accompanying the dizziness, as follows: 1. If the patient is a middle-aged or elderly person, sudden onset of severe dizziness accompanied by nausea, vomiting, and general weakness is considered to be caused by cerebral vascular spasm, cerebral blood supply deficiency, cerebral infarction, and other diseases; 2. If the dizziness, vomiting, nausea, and general weakness appear when riding on transportation, it may be caused by motion sickness; 3. If the patient appears in a high-heat environment, such as after taking a bath or after emotional exposure, it is considered to be related to the patient’s neurological disorder; 4. If the patient appears in a posture for too long, accompanied by stiffness and pain in the neck, it is considered to be caused by cervical origin, such as cervical spondylosis. Cervical vertigo.