What are the causes and symptoms of heat stroke?

Heat stroke is caused by long-term or intense physical labor in a high humidity or high temperature environment, or by prolonged exposure to strong sunlight, which produces and absorbs more heat than the body can dissipate. It may also be caused by too high a temperature, or by excessive sweating due to lack of water. Most symptoms of heat stroke are dizziness, headache, acid vomiting, vomiting of food, weakness, etc. Usually to participate in more exercise exercise, can increase the body's resistance and immunity ability, as long as the physique enhanced, it is not easy to heatstroke.