Patients with dizziness, nausea and runny nose may have the following reasons: 1. If the patient is an elderly person, he or she may have cerebral arteriosclerosis and cerebral blood supply deficiency, which may cause the patient to have dizziness and nausea. When patients have respiratory tract infection or cold, it may lead to runny nose, or patients with allergic rhinitis may also easily lead to runny nose. 2. Consider upper respiratory tract infection that leads to dizziness, nausea and runny nose. When patients are attacked by germs or viruses, pathogenic bacteria will secrete inflammatory substances that can stimulate the body’s thermoregulatory center, causing patients to have feverish symptoms. When the fever causes the blood vessels in the patient’s brain to dilate, which may cause cerebral vascular spasm, so the patient will show symptoms of dizziness and headache.