The number of days a heart failure patient can last after a flashback is mainly related to the individual patient’s condition and the cause of the disease, and cannot be generalized. It is possible that heart failure patients may experience a relapse, i.e. the pain is more severe and they cannot eat, but suddenly the pain improves or their appetite improves, probably due to the secretion of hormones in the body, such as increased secretion of adrenaline, which causes patients to suddenly feel better. However, the maintenance time is not long, usually about 3-5 days or 1 week, depending on the individual, and some patients may experience deterioration again afterwards. Therefore, patients who experience the so-called return of light must be closely monitored and treated urgently if abnormalities occur. In addition, patients with end-stage heart failure can apply palliative care methods such as pain relief and nutritional support to minimize pain and prolong survival.