Due to the impact of Typhoon Lichma, the eastern part of China has recently entered into a continuous rainfall and windy weather. Continuous rains, high humidity, low air pressure, and high wind can trigger or aggravate cardiovascular diseases. Therefore, the prevention and treatment of cardiovascular diseases must not be neglected during the rainy season. The rainy season has a definite effect on patients with hypertension. Because of the fluctuation of air pressure and temperature, hypertensive patients mostly have poor blood pressure control and high blood pressure fluctuation in the rainy season. Therefore, during the rainy season, hypertensive patients should increase the number of blood pressure measurements and adjust their medications in a timely manner under the guidance of a physician in case of blood pressure fluctuations. In the choice of medication, it is also recommended to take long-acting antihypertensive drugs and avoid sudden discontinuation of medication. In addition, patients with rainy weather should also exercise properly and avoid staying at home all day. At the same time, it is important to cultivate a stable and optimistic mood and avoid excitement and high-fat diet. Patients with coronary artery disease should pay particular attention during the rainy season. Continuous rainy days can make the temperature lower than sunny days, while the humidity increases and the air pressure will be low, which will affect the blood oxygen level in the body at this time and also increase the risk of coronary plaque rupture. If the wind is strong outside and the patient goes outside for exercise, it will increase the oxygen consumption of the myocardium, increasing the aggravation of angina symptoms in patients with coronary artery disease and the risk of myocardial infarction. We also find that more patients with coronary artery disease visit the emergency room on rainy days when the temperature is not high. Therefore, we suggest that you need to take your medication regularly, monitor your blood pressure and blood sugar, avoid outdoor activities in windy weather, and seek medical attention promptly if you have chest pain or tightness. Patients with cardiac arrhythmia will have worse symptoms in rainy weather. These are related to environmental factors such as temperature, barometric pressure and humidity. Especially the level of air pressure, a significant drop in air pressure increases the occurrence of arrhythmia diseases, especially atrial fibrillation. Some patients without organic heart disease may also experience sinus tachycardia within this weather, and although it is not a disease state, they may experience chest tightness, palpitations, and other uncomfortable sensations that affect their daily treatment. Patients with palpitations are advised to make sure to visit their doctor as soon as possible to clarify the type of arrhythmia disease and whether further medication is needed for treatment. In addition, the rainy season also increases the occurrence of asthma and pneumonia, as well as the symptoms of depression in patients. During the rainy season, we should closely observe every “uncomfortable” sensation in our body to detect and treat the problem in time.