If the chest tightness caused by smoking persists, it is recommended to quit smoking, pay attention to rest, go to the hospital for regular treatment, seek the cause under the guidance of the doctor, and choose the appropriate treatment according to the cause. If you have been taking medication for three months, consider whether you have received regular treatment before, whether you have not taken medication as prescribed by the doctor, whether you have quit smoking, and whether it is related to other diseases. If the condition still exists after regular treatment, you need to go to the doctor for a follow-up examination in time to find out the cause, and then take active treatment with the help of the doctor. If smoking causes chest tightness, breathlessness and dizziness, it may be caused by harmful substances in cigarettes such as nicotine and tar stimulating the respiratory tract, and it is recommended to quit smoking, improve the lifestyle, and can be treated with oxygen to improve the symptoms. If the coronary artery blood vessel ischemia, spasm, may also be accompanied by pain in the anterior region of the heart, at this time you can sublingual nitroglycerin or fast-acting heart pills and other medications to improve the symptoms of ischemia and hypoxia of cardiomyocytes. If it is caused by chronic bronchitis, you can use bronchodilator drugs, and when combined with infection, you can use levofloxacin for anti-infection treatment. Symptoms must go to the regular hospital for treatment, relevant examination, do not take medication on their own, so as not to delay the condition, make the condition worse.