Tobacco and cigarettes are both harmful to health, and smoking tobacco is relatively more harmful than smoking cigarettes in a rolled product. Tobacco is commonly known as dry tobacco, which is dried in the sun and then rolled up directly on cigarette paper and smoked. This method is relatively simple, the smoke is very strong, the flavor is very strong, the tar content and nicotine content is large, the irritation of the respiratory tract is greater, on the trachea, the cardiovascular and cerebral vessels, the lungs can bring direct harm. Dry tobacco smokers are common among the elderly in rural areas. The tar content of cigarettes is significantly lower than that of dry cigarettes after treatment and testing. In addition, cigarettes will be assembled with filters, which can filter out a large portion of harmful substances, compared with dry cigarettes, which have no filters. In conclusion, cigarettes are less harmful than tobacco. But in general, no matter which kind of smoke, will cause harm to health, can cause lung infections, low immunity, and can increase the risk of lung cancer, breast cancer and other cancers, but also increase atherosclerosis, high blood pressure and other incidence, etc., it is recommended that smokers should be active in quitting smoking.