Why do people feel tired so easily when the weather is hot?

According to biology, too high or too low temperature will affect the activity of enzymes, while pepsin, amylase and so on are the ones that digest food. Therefore, high temperature will reduce the activity of enzymes in human body and affect appetite. Eating sour food at high temperature will increase stomach acid and increase appetite. It is very hot in summer. Chinese medicine believes that yang is strong, people have less sleep, poor rest and poor appetite. At the same time, because of sweating, consumption is also high. Therefore, people are often more prone to physical discomfort in summer, and some food hygiene problems are also involved in summer. There is a saying, "Pay your debts quickly in June", which also shows that health problems are prone to occur in summer.