Postpartum chest tightness should be actively searched for the cause of chest tightness and treated for the cause. The common causes are: first, pulmonary embolism. If there is pulmonary embolism examination after delivery, plasma D-dimer will be significantly elevated, do pulmonary vascular strengthening CT, the site of pulmonary vascular embolism can be found, to be actively anticoagulated treatment. Second, perinatal cardiomyopathy. Patients will have the manifestation of heart failure, in addition to chest tightness, there will also be shortness of breath, palpitations, less urination, inability to lie down, bilateral lower limbs edema and other symptoms, to be treated with vasodilatation, diuretic, cardiac strengthening, protection of cardiac function. If the treatment is timely, the patient can recover completely.