"Hot cold" symptoms are mainly manifested as fever, dizziness or headache, sore throat, cough, phlegm or yellow, yellow nose, dry mouth and tongue, limb weakness, loss of appetite, etc.

　　Causes:

　　1, because the summer climate is hot, the human body sweat more, sweat gland secretion will consume a lot of energy.

　　2. In summer, the days are long and the nights are short. In sultry weather, it is easy to affect people's normal sleep and rest, resulting in insufficient sleep and fatigue.

　　3. In summer, many people lose their appetite, mainly by light food, which affects the intake of protein.

　　4, because of the hot weather, people do not want to go out to exercise, so the human body's resistance to fall.

　　5. Due to the large temperature difference between day and night in different regions, the elderly and children are prone to catch cold at night.

　　6, abnormal weather brings hot and cold, people did not timely adapt to the temperature change, thereby increasing the chance of infection and cold.

　　7, a lot of people coax cool, like blowing air conditioning, cold shower and other behavior, it is easy to make people catch a cold in summer.