Summer is not moving, sweaty, this is a normal physiological phenomenon, because the body needs to sweat through a lot to release excess heat, to maintain the physiological balance of the body. Head because there is a large number of hair, scalp has a large number of rich blood vessels, blood vessel expansion heat dissipation, so it will be full of sweat. In the summer pay attention to the need to prevent heat stroke, try to move in the shade, do not work in the high temperature, if there is fever, headache and dizziness, vomiting, general fatigue, must go to the hospital in time for examination, infusion, antipyretic treatment.