The common causes of chest tightness and chest pain on stairs are low blood sugar, heart disease, respiratory system diseases, etc. 1. Hypoglycemia: Hypoglycemia attacks can be manifested as sweating, hunger, panic, trembling, pallor, etc., and are prone to dizziness, rapid heartbeat, chest tightness, chest pain and other symptoms when climbing stairs. 2. Heart disease: myocarditis, coronary heart disease, angina pectoris and other heart diseases, there will be paroxysms of chest tightness and shortness of breath when going up the stairs, which can be relieved by resting under normal circumstances. 3. Respiratory diseases: chronic obstructive pulmonary disease, pneumonia, bronchitis, bronchitis and other respiratory diseases can also appear on the stairs when chest tightness, chest pain, shortness of breath. Chest tightness and chest pain on the stairs may also be caused by other reasons, should go to the hospital in time to identify the cause and under the guidance of the doctor for targeted treatment.