Which solar term did the dog days start from?

Preventive measures in dog days

1, long-term exposure to high temperature, people's sympathetic nerves will be more excited, heart rate will be accelerated, coronary artery will contract obviously, increasing the workload of the heart.

2, the weather is hot and sweaty, and the water in the human body evaporates through sweat, which will lead to high blood viscosity. When it reaches a certain amount, blood coagulation will occur, leading to cardiovascular and cerebrovascular blockage or ischemia, and in severe cases, stroke or myocardial infarction will occur.

3, the weather is sultry, people are easily irritated, which in turn leads to autonomic nervous disorder. After a long time, cardiovascular diseases such as sudden death and myocardial infarction will occur.

In summer, the days are long, the nights are short and the weather is hot. Sleep is often not guaranteed, and poor rest is one of the main reasons for the recurrence of cardiovascular diseases.

5. In summer, the air humidity is high and the oxygen content is low, which easily leads to hypoxia. Especially for patients with cardiovascular diseases such as hypertension and coronary heart disease, it should be noted that taking medicine on time cannot guarantee the safety of 100% due to the decrease of oxygen content and the increase of humidity. Some people will also have dizziness, shortness of breath, chest tightness and other symptoms, and even serious myocardial infarction. At this time, it is best to go to a regular hospital for a comprehensive examination.