It should be the constitutional relationship. People with cold constitution are more afraid of cold. They should pay attention to the details of life at ordinary times, eat less cold food, cold drinks and frozen products, and keep warm at night, especially after exercise. At this time, the human body is more relaxed, and it is easy for cold air to invade the body. You can soak your feet in hot water every night, which is very good for your health. Put two slices of ginger when making tea.