Answer :
Relatively less blood is sent to the skin for heat dissipation after vigorous activity in the heat with associated dehydration.
Skin blood flow (SkBF) increases with an increase in body temperature to facilitate the transmission of metabolic heat from the core to the skin. When you exercise in hot, humid weather, your body's core temperature can rise quickly, putting you at risk for heat exhaustion or heat stroke. A lesser type of heat disease called heat exhaustion can appear after several days of exposure to high temperatures and insufficient or uneven fluid replacement. The cardiovascular system redistributes blood during activity so that working muscles receive more of it while other body organs, such the digestive system, receive less. This change in blood flow is brought on by a process or mechanism known as the vascular shunt mechanism.
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