The first time smoking dizziness, may be caused by tobacco allergy, the human body produces an allergic reaction may appear headache, dizziness, nausea, vomiting, at the same time can appear all over the body skin rashes, may appear in serious cases of laryngeal edema, anaphylactic shock can also occur, may cause fever and so on. If dizziness occurs when smoking, it is an allergic reaction, you should quit smoking in time, and if necessary, you can give anti-allergy treatment, you can inject benzylamine, or oral cetirizine, and at the same time, you can apply vitamin C and so on. In addition, it may also be caused by the vasoconstriction effect of nicotine in cigarettes, or lead to vasospasm, vasoconstriction or vasospasm may cause insufficient blood supply to the brain, including the cerebellar brainstem and the cerebral blood supply insufficiency. Patients with insufficient blood supply to the cerebellar brainstem are mainly characterized by dizziness, balance disorders and ataxia, while those with insufficient blood supply to the brain are mainly characterized by darkness in front of the eyes, sensory or motor dysfunction of the limbs and so on.