Dizziness and nausea after smoking may be caused by allergy to tobacco. First of all, we should quit smoking, in addition, smoking may cause vasospasm, severe vasospasm may cause hypoperfusion of the brain, which may easily cause cerebral blood supply insufficiency, and the patient may experience dizziness, nausea, vomiting, or balance disorders, ataxia, or blackness in front of the eyes may also occur. If necessary, Xibirin and Ginkgo biloba drops can be applied to improve blood circulation for treatment, and Danshen and Panax ginseng can be applied to activate blood circulation and remove blood stasis for treatment. If the patient has severe dizziness and nausea, he/she can also take oral cardioplegia, pethidine, vitamin B6 or metoclopramide, etc. if necessary. In addition, smoking may cause an increase in blood pressure, blood pressure should be monitored, and if the blood pressure is elevated, blood pressure lowering treatment can be carried out. In general, the middle-aged and elderly preferred calcium antagonist, commonly used drugs for amlodipine; young people generally preferred ACEI or ARB class of blood pressure-lowering drugs clinically generally used enalapril, irbesartan or valsartan.