Now that winter has come, the temperature has dropped. Because I didn't pay attention to heat preservation, I was in the middle of a cold, and the cold was really unbearable, so I was always careful, but it was difficult to escape this time.

When it is cold, you should wear more clothes and exercise more, and you also need to know some health knowledge to protect yourself better.

There is a folk proverb circulating in many places in our country: "Wash your face with cold water, beauty care"; "Brush your teeth with warm water, and your teeth like it"; Washing feet with hot water is like taking tonic. These proverbs all have certain scientific truth, especially in winter, we should not ignore such daily chores as washing our faces and brushing our teeth.

Washing your face with cold water can prevent colds.

Many people have this experience. After getting up in the morning or taking a lunch break, wipe your face with a towel soaked in cold water, and suddenly your mind is clear, your eyes are bright and your spirit is uplifted. In the process of washing your face with cold water, the stimulation of cold water can not only improve the blood circulation of the face, but also improve the nutritional structure of skin tissue, enhance the elasticity of the skin, and eliminate or alleviate facial wrinkles. It can be seen that washing your face with cold water is not only good for hygiene, but also good for beauty. The health care function of cold water washing face also lies in: training people's cold tolerance, preventing colds and rhinitis, and also benefiting patients with neurasthenia and nervous headache. Of course, the temperature of cold water for washing your face should not be too low, but higher than 10℃. Such a temperature will have a warm feeling in the cold winter.

Warm water is an oral protectant.

Data show that human teeth can undergo normal metabolism when the oral temperature is 35-36.5℃. If the teeth are often stimulated by sudden cooling and sudden heating, it may lead to pulp bleeding, pulp spasm or other dental diseases. Scientists believe that brushing your teeth with warm water is good for your teeth. On the contrary, brushing your teeth with cold water for a long time will lead to the end of "people are not old, teeth are old". According to a survey conducted by the Japanese Ministry of Health and Welfare, the average life expectancy of teeth is shorter than that of people 10 years, and the fundamental reason lies in the habit of brushing teeth with cold water. Practice has also proved that warm water around 35℃ is a benign oral protective agent. Rinsing your mouth with this kind of water is not only good for your teeth, but also good for your throat and tongue. It is also good for removing bacteria and food residues from your mouth, which will give you a refreshing and comfortable taste.