Walking fast chest pain is mainly caused by heart disease, heart disease is mainly angina, in serious cases may be a heart attack. When suffering from especially in walking will be significantly strengthened, chest pain is called exertional angina, the pain can be significantly relieved after rest, this phenomenon should promptly go to the hospital for related examination. If necessary, CTA examination or coronary angiography should be done to clarify the degree of stenosis of blood vessels and accurately determine the situation of heart ischemia, and if necessary, medication or surgical treatment should be taken. The pain in the chest when walking too fast may be caused by lung diseases, including pneumonia, pleurisy and bronchitis, and chest pain may occur when breathing is accelerated after walking too fast.