Go to bed late and get up early in summer, and try to take a nap at noon. Remember not to sit, lie down or sleep for a long time in the corridor, under the eaves or in the shade of the vents. Electric fans should not be used for a long time, because in summer, the outside is steaming at high temperature, sweating a lot, and the pores are wide open, which makes it easy to catch cold. If it is blown for a long time, it may cause headache, lumbar muscle strain, facial paralysis or muscle pain.