Walking a few steps and feeling uncomfortable chest tightness indicates the presence of coronary heart disease exertional angina, chronic obstructive pulmonary disease, etc., and should be treated according to the cause of the disease with general treatment, medication, surgery, and so on. 1. Coronary heart disease exertional angina pectoris (1) General treatment: stop and rest immediately, reduce myocardial oxygen consumption, reduce the symptoms of angina pectoris, and usually avoid high-fat diet. (2) Drug treatment: anti-angina and anti-myocardial ischemia (such as nitroglycerin, nifedipine, propranolol, etc.). Improve symptoms and prevent further development of exertional angina, including antiplatelet therapy (e.g. aspirin, clopidogrel, etc.), lipid-lowering therapy (e.g. atorvastatin, fenofibrate, etc.), lowering blood pressure, and improving myocardial remodeling therapy (e.g. captopril, valsartan, etc.). (3) Surgical treatment: when patients with severe symptoms are not well treated with medication, they can be treated with percutaneous coronary intervention and coronary artery bypass surgery. 2. Chronic obstructive pulmonary disease (1) General treatment: rest, avoid exertion, quit smoking, avoid respiratory infections, etc. Oxygen therapy can be chosen to improve the oxygen supply to the organs if necessary. (2) Drug treatment: symptomatic use of bronchodilator drugs (such as salbutamol, etc.), cough expectorant drugs (such as ambroxol, etc.), anti-infective drugs (such as cefoperazone, levofloxacin, etc.). (3) Surgical treatment: When internal medicine treatment is ineffective, lung transplantation and other treatments can be chosen. When there are a few steps to feel uncomfortable chest tightness may also be other reasons, please go to the hospital in time to avoid delay. The above drugs need to be regulated under the guidance of a doctor.