Because tobacco contains a lot of nicotine, smoking is very damaging to the human body, smoking a cigarette the body’s intake of nicotine content, seven days or so in order to exclude clean, so it is recommended not to smoke. Smoking is harmful to health, the damage to the lungs is particularly great, but also to the cardiovascular damage, resulting in coronary atherosclerosis, cardiovascular plaque changes, and smoking can lead to cancer, stomach diseases and a series of diseases. But if you can’t stop smoking in a short period of time, you can drink more water after smoking, which is good for the body to eliminate nicotine and other harmful substances. Long-term smoking will lead to black dirt in the lungs, which can not be eliminated for many years, but the garbage and toxins in the lungs can be removed by washing the lungs and other methods.