Taking a bath in cold water is a favorite way for many people, especially young and middle-aged men. However, the weather is hot in summer, and people's pores and muscles are in a state of venting. Therefore, cold air can easily invade the human body, leading to the loss of yang. You can see symptoms such as cold hands and feet, hamstring twitching, blurred vision in both eyes, and even unexplained fever. At the same time, even if you take a hot bath, you should pay attention to shelter from the wind after taking a bath, especially for children.

Two: The sooner you do morning exercises, the better.

Many people think that the earlier you do morning exercises in summer, the better. In fact, the air is not fresh before dawn or when it is foggy, which is not conducive to fitness. According to experts' research, before 6 o'clock in the summer morning, pollutants in the air are the most difficult to spread, which is the peak of pollution. In addition, before sunrise, there was not much fresh oxygen around the green plants because there was no photosynthesis. Practicing too early in the morning is easy to catch a cold, causing joint pain, stomach pain and other diseases. Therefore, the time for morning exercise in summer should not be earlier than 6 o'clock.

Three: gluttony and refrigerated watermelon

Eating watermelons that have been refrigerated for a long time is harmful to human health. Because when eating frozen watermelon, the salivary glands, tongue taste nerves and periodontal nerves in the mouth will be paralyzed due to cold stimulation, which will not only make it difficult for people to taste the sweetness of watermelon, but also hurt the spleen and stomach. Children's digestive ability is poor, and eating frozen watermelons can also cause anorexia, vomiting, diarrhea and other symptoms.