Occasionally smoking a cigarette is actually less harmful to the body, most of the harm to the body of smoke, are due to a large number of long-term smoking, so occasionally smoking a cigarette is not a big problem. But if there are no special circumstances, or try not to smoke is better. Smoke contains a lot of harmful gases that can easily stimulate the throat, trachea and bronchial tubes, which can easily lead to mucosal damage, resulting in reduced resistance and infection, which can easily lead to respiratory infections, such as laryngitis, bronchitis or pneumonia. The carcinogenicity of harmful substances in smoke is relatively strong, but wherever smoke passes, cancer is likely to occur, such as oral cancer, throat cancer, stomach cancer, esophageal cancer or lung cancer. So it is better to try not to smoke and quit smoking as soon as possible.