As temperatures plummet and the cold winter months are a time of high incidence of colds and flu, we hope that the following tips for preventing and relieving cold and flu symptoms will help you have a “warm” winter. Don’t get into the bad habit of rubbing your nose or picking your nostrils, and keep good hand-washing habits. These can help minimize contact with flu viruses and respiratory pathogens. Make it a point to wash your hands under running water for more than 30 seconds after riding the bus and subway, after touching keys, wallets, and doorknobs, after tying your shoes, after using the restroom, and before eating a meal. Places with poor air circulation are prone to promote pathogenic bacteria and viruses. It is recommended that bedrooms and living rooms should be kept ventilated for half an hour every day, and air purifiers can be turned on on hazy days. Wear a mask when taking public transportation, not only to protect yourself but also to reduce the chance of spreading possible pathogenic bacteria to others. When you feel a short dry throat and sore throat, you can gargle with light salt water, which is good for removing part of the germs in the mouth and upper respiratory tract. When you feel nasal congestion and breathlessness, you can use light salt water to clean the nasal cavity, and you can also press the Yingxiang acupoint located on the outer edge of the nose with the fingertips of your fingers. Adhere to the good habit of running every week is also conducive to relieving the symptoms of nasal congestion, but also enhance the resistance of the upper respiratory tract, which can be said to be two birds with one stone. It is recommended to drink 1.5 to 2 liters of water a day, in order to reduce gastrointestinal stimulation in winter is suitable for drinking warm water. Drinking more water can speed up the metabolism, promote the excretion of metabolic waste, accelerate the transportation of nutrients, drink more water can also help dilute sputum, easy to cough up, to shorten the duration of acute upper respiratory tract infections also have some help. Sleep-deprived people with dark circles under the eyes, the immune system function is also weaker than normal, the risk of obesity, type 2 diabetes will also increase. Maintaining 8 hours of adequate sleep is necessary to build your own strong immune system. Vitamin A and vitamin C can enhance the defense ability of respiratory epithelial cells. It is recommended to increase the intake of orange and red fruits and vegetables in the autumn and winter when colds are common, and you can also take vitamin A 5,000 International Units (1,500 micrograms) and vitamin C 100 milligrams orally every day.