Quitting smoking for half a month is likely to be effective. Cigarettes contain nicotine, tar and other ingredients, long-term smoking may become addictive. If you quit smoking for half a month, the toxins accumulated in your body will be partially or even completely metabolized, so quitting smoking for half a month is generally effective. Insomnia, dizziness, headache, cough and other symptoms caused by long-term smoking will generally be relieved, and the lung function damage caused by long-term smoking may also be restored. However, the body’s response after quitting smoking for half a month is not exactly the same for everyone, and is related to the individual’s physical condition, age of the smoker, and the amount of cigarettes smoked per day, so quitting smoking for half a month may have an effect. The hazards and potential dangers of smoking are very great, so you must insist on quitting smoking, and it is not recommended to resume smoking.