Any disease that is missed or unknown can easily miss the opportunity for diagnosis and treatment, leading to worsening of the condition. Chronic heart failure is very subtle and difficult to detect in the early stages. Especially when there are elderly people at home with underlying diseases, it is important to closely observe their daily performance. Once suspicious symptoms are detected, they should seek medical attention in a timely manner. Today, cardiologists have summarized six warning signals for heart failure. Patients with decreased activity tolerance have recently experienced sudden physical fatigue and fatigue, and are also lazy and scattered during the day. Some simple daily tasks begin to become inadequate, and suddenly things that could have been completed in the past, such as walking the dog, going up and down stairs, become difficult to do. If you are an active person, under normal exercise levels, you may feel significantly more tired than usual and may experience shortness of breath or difficulty breathing. Loss of appetite and heart failure can disrupt normal systemic circulation and cause gastrointestinal blood stasis, leading to intestinal dysfunction. Patients may exhibit a loss of appetite, inability to eat, difficulty digesting after eating, and a constant feeling of bloating and vomiting. The mental and psychological problems of heart disease patients in China are very severe, and heart failure patients are more likely to exhibit depressive psychological disorders, often manifested as indifferent or even dull expressions. Patients with long-term cough and heart failure experience increased pulmonary venous pressure, which leads to obstruction of pulmonary circulation and an increase in exudate in the alveoli, leading to cough. The characteristic is a noticeable cough at night, which alleviates when sitting or standing, and feels particularly comfortable when lying flat. Coughing increases sputum production, and in addition, patients may experience symptoms such as difficulty breathing, dizziness, and palpitations. Swelling of the lower limbs, ankles, and feet is a common symptom of heart failure, often caused by fluid accumulation due to heart failure and renal dysfunction. It is worth noting that although there is swelling, it is difficult for the patient to feel the pain themselves, and they can relieve and disappear on their own after lying flat and resting. Sometimes patients may not notice the issue of swelling but notice a sudden increase in weight, which should also be taken seriously. Sleep disorders in heart failure result in reduced cardiac output and a state of hypoxia in brain cells, which to some extent affects normal sleep. At the same time, patients with heart failure are also more likely to experience "central sleep apnea", which can cause them to wake up at night due to holding their breath and reduce sleep quality. In addition, there are also some heart failure patients who experience cerebral infarction due to the detachment of blood clots, which makes them prone to "drowsiness". Heart failure is a "syndrome". Heart failure is the final stage of cardiovascular disease, which is progressive and has a high mortality rate in hospitalized heart failure patients. In order to improve the survival rate and quality of life of patients with heart failure, it is necessary to strengthen awareness and attention to heart failure. Early detection and intervention are the key to achieving good therapeutic effects. Heart failure is not a specific disease, but a "syndrome". Individuals with underlying cardiovascular diseases, diabetes, obesity and other risk factors, as well as family history of cardiomyopathy or past history of myocardial infarction are more prone to heart failure. Therefore, close attention should be paid to physical changes. In case of abnormal situations, it is necessary to first avoid heavy physical activity and emotional fluctuations to avoid excessive pressure on the heart. Next, it is necessary to go to the hospital for electrocardiogram and other examinations in a timely manner to understand the situation, and carry out personalized adjustment under the guidance of a doctor. Wen/Wang Fang (Beijing Hospital)