According to the theory of "four-season health preservation" in traditional Chinese medicine, summer is a fire, which leads to chills, and people are prone to symptoms such as irritability, fatigue, chest tightness, poor sleep, headache and palpitation. From the point of view of modern medicine, the high temperature of human body is easy to cause endocrine changes and mental instability, which makes people feel restless, irritable and even behavioral disorders, such as insomnia, forgetfulness, depression and loss of appetite.

Regular work and rest can calm the mood. If you have insomnia, you can relax your whole body muscles when lying on your back or side, or pay attention to the ups and downs of abdominal breathing. After you get rid of other thoughts, you will naturally fall asleep when you are calm.

There is a folk custom of "eating lotus roots in summer" in China. As early as the Xianfeng period of the Qing Dynasty, lotus root was designated as a tribute to the imperial cuisine. Traditional Chinese medicine believes that raw lotus root has the effects of clearing away heat and promoting fluid production, moistening lung and removing blood stasis, reducing swelling and stopping bleeding, and can be used to treat fever, polydipsia and gonorrhea. Cooked food has the effects of strengthening the spleen and stomach, promoting digestion and stopping diarrhea, and solidifying essence.