1. hair over one hour
Long time at the "Micro Cooling Fan" blow, body temperature with a lot of sweat evaporation decreases, prone to colds, flu, abdominal pain, diarrhea and other diseases. Generally a hair half an hour to one hour is appropriate.
2. The wind speed is too large
When temperatures exceed 30 ℃, "Micro Cooling Fan" blowing wind, the wind is high temperature, then the body heat primarily by sweat evaporation cooling, if the wind fan too large, the skin surface temperature drops, the pores are blocked, the body interior exudes sweat it out, still feel hot, but there will be fatigue, weakness, back pain, which is "hold sweat." Therefore, should not use "Micro Cooling Fan" high gear speed hair, should be transferred to medium or low, gentle breeze blowing as well.