Headache is one of the common neurological symptoms, smelling smoke headache may be more sensitive to the stimulation of harmful substances in tobacco, or have their own migraine and other diseases, after smelling smoke induced the original disease. 1, tobacco stimulation: because tobacco contains a large number of harmful substances such as nicotine, nicotine, benzopyrene will stimulate the vascular endothelium, triggering cerebrovascular spasm, neurovascular headache, in addition is tobacco generated The carbon monoxide can combine with hemoglobin in the blood, causing oxygen binding disorders, resulting in cerebrovascular and brain tissue hypoxia, which will also lead to headaches; 2. Psychological factors: when the patient is more sensitive to the smell of tobacco and the rejection is more obvious, there is an aversion psychology, and every time he smells tobacco, he may give himself a psychological implication and have headaches; 3. Disease factors: for example, the patient himself has a history of migraine, the stimulation of the smell of tobacco or the stimulation of other strong odors may trigger migraine attacks, or aggravate the original symptoms. If the patient has cerebrovascular diseases, such as cerebral arteriosclerosis, the inhalation of smoke may cause a relative decrease in the oxygen content of inhalation, which may cause a transient cerebral blood supply deficiency, resulting in a headache. If the headache is caused by sensitivity to the taste of tobacco or psychological factors, the symptoms will improve if the patient avoids contact with the smoking environment, but if the patient has a primary disease, he or she should go to the hospital for treatment in a timely manner, and should also pay attention to regular diet and rest, avoid staying up late, and avoid overwork.