Eight months after quitting smoking generally do not have any clinical symptoms, the act of quitting smoking itself does not have any harm to the body, and quitting smoking can also reduce the toxicity of smoke to the lungs. Quitting smoking not only reduces the harm of nicotine to the lungs’ tracheobronchial and alveolar tissues, but also reduces the probability of malignant tumors caused by smoking. One week after quitting smoking, there will be more obvious withdrawal symptoms, such as insomnia, excitement, tears, runny eyes, tremor, etc., but these symptoms can be basically completely disappeared eight months after quitting smoking. In addition, smoking cessation itself is not harmful to the organism, so there will not be any symptoms after eight months of quitting smoking, it is recommended to adhere to the smoking cessation, to ensure a certain amount of exercise and a healthy diet, which is conducive to good health.