Taking a cold bath helps blood vessels to do gymnastics and enhance immunity. It is hot in summer, and many people will take a cold bath to cool off. Taking a cold bath can relieve summer heat and enhance immunity, which is called "vascular gymnastics". After continuous exercise, you can take it not only in summer but also in winter. But taking a cold bath has steps and taboos to avoid causing physical discomfort. When taking a cold bath, the skin surface will turn white due to the contraction of cold water before 1 to 2 minutes, and blood will flow to the depths of internal organs. But after washing for 2 to 3 minutes, the blood will be redistributed, the blood will flow back to the skin surface, and the skin will gradually turn red. The whole process is like doing vascular gymnastics. First, get used to taking a cold bath. It's best to start exercising in summer, and take a cold bath in winter when your body can adapt. Warm-up is the same as exercise. Take a cold bath to warm up first. You can make your body move, or rub your skin for a few minutes to make your skin a little red and hot. You can also do a tendon massage when rubbing. It is not advisable to take a cold shower for a long time. The whole process should not take too long, 10 minutes or so, and the longest time should not exceed half an hour. If you often take a cold bath and are in good health, you can use the three-warm method of alternating hot and cold, and the effect will be better, but you must try it in good health. Keep warm after washing. In addition to taking a cold bath for a long time, wrap a bath towel or put on a bathrobe immediately after washing, and put on clothes to keep warm immediately to avoid catching a cold. Wash your limbs first, so that your body can adapt to cold water slowly. When taking a cold bath, you should rinse first and then soak. When rushing, you should also pay attention to starting from your hands, feet and limbs for a few minutes, and then rushing to your chest. Don't be too irritating to your body. You can add essential oil to take a cold bath for no more than 5 minutes, and you can add some essential oil when taking a bath. Dr Andy Sun said that he personally likes to add a little mint to completely relax his body. After taking a cold bath at night, he can go to bed immediately and sleep soundly. Don't stop taking a cold bath when you are uncomfortable. If you feel shivering with cold, your skin is turning white and dizzy, stop immediately and don't try to be brave. Paying more attention to taking a cold bath is good for your health, but not everyone can try. Don't take a cold bath in the following situations, it is cold in winter. Don't try it easily unless you are used to taking a cold bath or you are strong. Taboos to take a cold bath When high blood pressure has symptoms such as neck pain, dizziness and headache, don't take a cold bath, because when taking a cold bath, blood vessels will contract rapidly and blood pressure will soar. When taking a cold bath during a heart attack, blood rushes to the heart, which will make it unable to load. People with poor liver, kidney and lung function are also not suitable for taking a cold bath, because their organs may not be able to load. After drinking wine, the pores of the skin are fully open. When taking a cold bath, it will shrink rapidly due to cold water, and the impact is too great for the body to bear. Engaged in strenuous exercise after strenuous exercise, just like drinking, will sweat, fever, will make the skin pores fully open, take a bath immediately, the body will be unable to eat. During menstruation, pregnancy and confinement, women with insufficient qi and blood are not suitable for taking a cold bath for vascular gymnastics because of their weak body, insufficient qi and blood and poor blood circulation. When you just have a full meal, blood will flow to your stomach to help you digest food. If you take a cold bath immediately, it will make blood flow from the stomach to other internal organs of the body and affect digestion. You should take a cold bath half an hour after dinner. Feel unwell, cold, fever or any inflammation, etc. Because of weakness, it is not suitable for taking a cold bath again. There are many benefits and it is not easy to catch a cold. People who often catch a cold and have poor immunity can take more cold baths to increase their cold tolerance and enhance their immunity. In addition, blood will flow to internal organs, which can take out visceral toxins and promote visceral metabolism. Help sleep and soothe the nerves, the heart beats faster, and dry mouth can lead to autonomic nerve disorders. Taking a cold bath can make the autonomic nerves not excited, which is helpful to sleep and soothe the nerves. Helps digestion. Taking a cold bath can promote gastrointestinal peristalsis and improve digestive function, but don't take a cold bath within half an hour after meals, so as to avoid the rapid outflow of blood from the stomach and cause indigestion. The skin is elastic. Taking a cold bath often can make blood flow to subcutaneous tissue, making skin softer and more elastic.