How long does it take to quit a smoke test that won’t show up? Understanding may be a special career requirements absolutely can not smoke, want to apply for the occupation, once smoked, I want to ask how long the impact of smoking on the body to eliminate, do not show, specific analysis of the specific situation. First of all, it depends on the time of smoking, the amount of smoking, if there has been quite a long time, the amount of smoking is also very large, the traces of smoke on the body will easily show up, including the color of the lips and mouth, the palms of the hands were smoked smoldering color, to disappear takes quite a long time. If the smoking time is not too long, the amount is very small, the impact of the deposition of tobacco substances on the body may be more quickly removed, the specific time to have an absolute time standard is difficult, depending on the quality of the individual’s body, but also with the method of smoke testing. It is recommended that patients actively quit smoking, which is very helpful for our hypertension, coronary heart disease, and cardiovascular malignant events caused by hypertension combined with coronary heart disease. In addition, for COPD, quitting smoking can be the only measure that can slow down the decline of lung function.