Alcohol and tobacco can lead to increased blood pressure in patients for the following reasons: First, after drinking alcohol, patients will have increased sympathetic tone, at which time they will experience increased myocardial contraction, increased heart conduction velocity, and increased heart rate, which will result in increased cardiac oxygen consumption, which will then lead to clinical symptoms of increased blood pressure. Secondly, long-term alcohol consumption will also lead to activation of the renin-angiotensin-aldosterone system, which will also lead to an increase in blood pressure after increased secretion of aldosterone. Third, alcohol and tobacco can also lead to disruption of the endocrine system in the body, which can lead to dysregulation of the neurohumoral endocrine system, which can also lead to a rise in blood pressure in this case. Fourth, if the patient has a clear history of hypertension or heart disease, after drinking alcohol, the patient will have an increase in the preload and afterload of the heart, and then there will be secondary changes in blood pressure.