Air conditioners change the temperature of the entire room, but to feel the effects of a fan, you’re gonna need that air blowing directly on you. Doing that all night will inevitably result in muscle stiffness, soreness, or pain. Yes, sustained gusts of wind, no matter how tiny, can make you feel crummy after constant exposure for hours while you sleep. Not cool.
View more information: https://www.distractify.com/fyi/2018/08/13/2vmeab/can-fans-make-you-sick