Chest pain after six months of smoking cessation usually has nothing to do with the act of quitting smoking itself, but may be a combination of clinical diseases such as tuberculous pleurisy, angina, and so on. First of all, quitting smoking does not cause adverse consequences for the organism, but also reduces the harm of nicotine to the respiratory system, which is conducive to the health of the organism. Chest pain after six months of smoking cessation can be caused by clinical diseases such as tuberculous pleurisy and angina pectoris. If the chest pain is caused by tuberculous pleurisy, anti-tuberculous drugs such as rifampicin, isoniazid, streptomycin, ethambutol, etc. can be given; and if it is caused by angina pectoris, it is recommended that nitroglycerin be taken sublingually, and that an electrocardiogram and other relevant examinations be completed in the hospital. If chest pain occurs half a year after quitting smoking, it is recommended to go to the hospital as soon as possible, and standardize the treatment under the guidance of the doctor to ensure a good prognosis for the disease.